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Lighting Info

Database compiled from lots of sources by chromakinetics.com

Table of Contents

Cable Specs

S Cord

Two or more stranded conductors with a = serving of=20 cotton between the copper and the insulation. Jute or other = fillers are=20 twisted together with the conductors to make a round assembly. = Outer=20 jacket of high quality rubber.
SJ Cord =
Same as "S" but with lighter jacket

SV Cord =  

 Same as "SJ" but with even lighter jacket

ST, SJT, SVT  

 Follow same progression as above, but with = thermoplastic=20 jacket
SO, SJO  
 Oil resistant jacket of neoprene
SC  
 NEC designation for entertainment industry and = stage=20 lighting cable; rated 600V Extra Hard Use
SCE  
 Same as above with PVC jacket
SCT  
 Same as above with TPE based=20 jacket

Top=20

Cable Amp = Ratings

  Here's a chart showing the gauge of cable necessary = for=20 certain load/distance combinations. Useful for those times when = you need=20 to run that 4th electric 2k from a FOH circuit, or to find out = just how=20 lightweight you can go for that pesky practical.
 
 
Gauge for Rated Load in AMPS =
Length
2
3
4
5
6
8
10
12
14
16
18
20
25'
18
18
18
18
18
18
18
16
16
16
14
12
50'
18
18
18
18
16
16
14
14
12
12
12
12
100'
18
16
16
14
14
12
12
10
10
10
8
8
150'
16
14
14
12
12
10
10
8
8
8
6
6
200'
16
14
12
12
10
10
8
8
6
6
6
6
250'
14
12
12
10
10
8
8
6
6
6
4
4
300'
14
12
10
10
8
6
6
6
6
4
4
4
400'
12
10
8
8
6
6
4
4
2
2
2
2
  Backstage Handbook, Paul Carter=20

Top=20

Amp = Ratings for=20 Feeders

AWG 60=BAC (140=BAF) 90=BAC (194=BAF)
 8 60 80
6 80 105
4 105 140
3 120 165
2 140 170
1 165 220
1/0 195 260
2/0 225 300
3/0  260 350
 4/0 300 405

These ampacities are permitted for single conductor types SC, = SCE, SCT=20 and W cable
only where the individual conductors are not installed = in a=20 raceway and are not in physical
contact with each other except in = lengths=20 not to exceed 24 inches where passing through
the wall of an = enclosure.=20 -1996 NEC
Top

Gel Info

Roscolux

Rosco has approximately 170 colors and frosts listed in their = Roscolux swatch=20 book.  Many more items are available in their Cinegel and CalColor = swatch=20 books.  Their numbering system is starting to get a little = scattered but=20 falls into these basic (and subjective) categories:  =
1-24:  Ambers=20 and Yellows. 
25-27:  Reds 
30-339: Pinks =20
40-342:  More Reds 
43-46:  More Pinks =20
47-359:  Purples and Lavenders 
60-385:  = Blues =20
86-96:  Greens 
97-98:  Grays 
99:  = Chocolate 
100-163:  Frosts 
3202-3318:  = Color=20 Correction 
Note the 300 series colors are listed with the sub = 100=20 series colors.  This is because 300 series colors are the newer = (and some=20 say sexier) Rosco colors.  So if you were flipping through their = swatch=20 book it would go 60-No color blue, 360 Clearwater, 61 Mist Blue, 62 = Booster=20 Blue, 362 Tipton blue, 63 Pale Blue, etc.& Top=20

Lee

Lee has approximately 212 items in their swatch book = including=20 color, frosts, and reflection materials.  Lee publishes a Designers = Edition=20 swatch book with the colors grouped by hue in addition to the Numeric=20 Edition. =20

2-90:  Similar to Roscolux colors of the same number =20
100-198:  Similar to Cinemoid colors.  Subtract 100 from = the Lee=20 color to get the Cinemoid color number. 
200-299:  Color = corection=20 and diffusion 
322-366:  More colors  =
400-452:  More=20 color correction and diffusion 
Top

GAM

The Great American Market (GAM) has approximately 200 colors = and=20 frosts.  Their GamFusion series of frosts won a award when it was = first=20 introduced.  The GAM numbering system is more structured than the = other=20 two. =20

10's:  Diffusion 
100's:  Magenta  =
200's: =20 Red 
300's:  Orange 
400's:  Yellow =20
500's:  Yellow Green 
600's:  Green =20
700's:  Blue Green 
800's:  Blue  =
900's: =20 Violet 
1500's:  Color correction
Top=20

Gel Cross = Reference

LUX LEE APOLLO GAM LENE CINEGEL CINECOLOR
00 130 - - - - -
01 176 7650 310 - - -
02 162 7050 340 803 - 602
03 108 7700   -   -
04 HT004 7300 325 -   -
304 152 -   -   -
05 -154 7900   -   -
305 151 -   -   -
06 212 6100 510 804   604
07 HT007 -   -   -
08 +103 6600 365 - 3134 605
09 HT009 7250   -   -
10 HT010 6300 480 -   -
310   - 460 -   -
11 102 6400 420 -   -
12   6200 480 -   609
312 101 6500 450 -   -
13 HT013 6700   -   -
14 +102/104 6800   +809   -
15 HT015 6900   810   -
16 204 7150 +395/386 - 3102 613
316 236 7400 +365 - 3401 -
17 017 7200   -   610
317 -147 -   811   -
18 147 7500 375 - 3106 614
318 - 7800 320 -   -
19 HT019 7850 28 -   -
20 HT020 7350 388 -   -
21 HT021 7450 350/345 -   615
321 134 7550   -   612
22 HT022 7750 -315 -   -
23 -158/HT021 7600 345 817   618
24 24 8200 235 819   -
25 -164 8250   818   -
26 HT026 8300 245 -   621
27 HT027 8350   823   -
31 107 -   -   -
32 166 -   -   -
332 - - 180 -   -
33 - 8550 155 825   624
333 - - 106 - 3313 -
34 - 8450 190 826   626
35 110/HT035 8600 160/154 -   -
36 HT036 8500   825   -
37 039 8700 105/152 - 3308 625
39 - 8900 140 -   -
339 +128 8750 140 -   -
41 - 8100   -   632
42 113 8400 +235 -   620
342 332 - 220 832   -
43 -128 - -120 -   -
44 002 8650 +130 -   631
344 328 8800 -110 828   -
45 +128 -   -   -
46 HT046 8850   836  
47 - 3050 990 -   638
48 48 3100 995 -   -
49 126 3150   -   -
349 126 -   838   -
50 127 -   -   -
51 136 3200 980 -   642
52 HT052 3250   -840   -
53 HT053 3300   -   -
54 702 3350   -   -
55 -137 3400   -   -
355 142 -   -   -
56 343 3450 -945 -   -
57 194 3500 +960 --   -
357 343/180 2550   843   -
58 HT058 3600 950 -   -
358 - 3700   -   -
59 181 3800 945/930 - 353 645
359 - -   846   -
60 -203/202 4750 -803 -   648
360 - - +830 - 3204 -
61 HT061 -   -   -
62 202 4700 +820 -   649
362 281 -   -   -
63 HT063 4800 820 -   -
363 +117 -   848   -
64 174/161 4650 815 -   -
364 201 - 882 -   -
65 196 4500   -   654
365 201 - 880 --- 3202 -
66 117 -   -   -
67 165 4600 810 -   -
367 161 -   -   -
68 068 4350   ---   -
69 183/141 4450   -   -
70 +117 -   849   -
370 131/115 4900   -   -
72 353/144 4850   855   -
73 +115 4950   -   -
74 195/363 4400 890/119 -   -
76 - 4970   -   -
77 132 4990   859   659
78 - - 848 -   -
378 - - 910 -   -
79 HT079 4200 845/835 857   -
80 132/079 4250 850 -   657
81 197/75 4300   -   -
382 181 - 930 -   -
83 119/HT85 4150 890 -862   661
383 120 3900 905 -   -
84 197 -   866   653
85 85 4050 890 -   -
385 713 4100 855 -   -
86 121 -   -   -
87 213 - 535 - 3315 669
88 138 - 540 - 3304 671
388 138 -   -   -
89 HT089 5800 660 -   672
389 - 5900 660 -   -
90 139/HT090 5400 655 874   -
91 - 5300   -   674
92 - - -680 -   673
93 219 5600   -   676
94 - 5700   -   -
95 -116 5500   877   -
97 209 -   - 3402 680
397 - -   - 3415 -
98 210 -   - 3403 681
99 156 7100 330 -   682
100 - -   801   -
101 - 1050   -   -
102 - -   - 3009 -
103 129 1100   - 3008 -
104 - 1150   - 3011 -
105 214 1400   - 3006 -
106 215 1450   - 3007 -
107 - -   - 3013 -
108 - -   - 3017 -
109 - -   - 3012 -
111 - -   - 3000 -
112 - 1500   - 3010 -
114 - 1550   -   -
115 - -   - 3001 -
116 216 1600   - 3026 -
117 250 -   - 3027 -
118 251 -   - 3028 -
119 253 1650   -   -
120 - 1800   -   -
121 - 1900   -   -
160 228 -   - 3015 -
162 397 -   - 3020 -
163 - -   - 3040 -
3204 202 4750 842 -   647
3202 201 - 882 --   655
- 161 4650   -   656
3411 204 7150 343 -   -
3408 205 -   -   -
3409 206 - 364 -   -
3410 223 -   -   -
3405 207 -   -   -
3406 208 -   -   -
3208 203 - 360 -   -
3216 218 - 870 -   -
3402 209          
3403 210          
3404 211          
             
             
             
             
    -   -   -
- -008 - 320 -   617
-   6600 365 - 3115 608
-   7800 320 -   615
-   7500 375 -   -
-   6400 420 -   -
-   5400 650 -   -
-   4600 810 -   -
-   8750 140 -   -
-   - +320 - 3310 611
-   - 170 -   627
-   - 280 -   619
-   - 780 -   652
-   - 740 -   658
-   -   - 3306 675
-   -   - 3314 622
-   -   - 3313 623

Basic table from Rosco.com - additional info added by TLS,Inc =

Top

Gobo Sizes

Type Outer diameter Image diameter notes
A 100 75
B 86 64.5
C 150 112.5
D 53 41
E 38 25
G 66 45 1
G (GAM) 44 35 1, 2
J 38.8 25
M 65.5 49.5
T 46.5 38
V 66 45 2
All dimensions in = millimetres=20

Notes:
1 as defined = by Rosco=20 and DHA. GAM define a "G" size gobo, which is much = smaller
2=20 with notch to facilitate insertion in gobo wheel

Top

Gobo = Sizes for=20 Fixtures

 
Pattern Size for Various=20 Manufacturers
 
Manufacturer
Product
size
notes
Altman ALT-STAR E 7 patterns each on 2 wheels
  LEKO B  
  MICRO E  
  3-1/2" M Needs trimming
  4.5 Zoom B All B size - glass also
  6", 360, 360Q B  
  1 KL Series B  
  Short Throw B  
  Explorer B  
  Follow Spot B  
CCT Silhouette & Project B  
  Silhouette Flat Field A  
  Minuette M  
Clay Paky Golden Scan M  
  SuperScan M  
  MiniScan E  
Colortran Ellipsoidal A B w/Adapter
  Mini Badapter B  
  ColorArc Follow Sp M  
  ColorArc M  
  213-05 Series A,B  
  Five/50 A  
  MiniEllipse B,A A Glass
  Zoom Mini B  
  Ellipsoidal 213 A  
  Zoom Ellipse A  
Electro Controls Paralisphere A needs trimming
ETC 450,436 A Gogo rotator
  425,419,410 B  
ETC makes holders to accept B size = patterns=20 and Glass patterns
Follow Spot 1200 B  
High End Systems Color Pro B Internal Mount Pattern Placement
  Trackspot V  
  Intellabeam V  
  Cyberlight   1.75 O.D. 1.50 I.D.
Kliegl 6" Ellipsoidal A  
  Quartz 1357,1360 A  
  Quartz Axial 1550 A  
  Incand. 1365 Series A  
  3.5" Ellipsoidal M  
L&E 6" B  
  AQ-1K B  
Lycian Follow Spot Midget B no pattern w/ Xeno Spots
  Midget HP (1209)    
Martin RoboScan 10-16   Fixed Wheels
  RoboScan 8-05    
  RoboZap    
MicroLight MicroProfile E  
Mole-Richardson MoleEllipse B  
  2000 A  
Pani Profile A  
  650W, 1000W, 2000W A  
  BP Projector A,C w/ adaptor
Strand Patt 23,23N B  
  Patt 765,793,794 C  
  Patt 293,294 C  
  Patt 263,264 A,B Glass Also
  1343 Series Old C  
  1480/1490 Series B Diecast
  2300 Series B Diecast w/ Step lines
  2100 Series B needs trimming
  Cantata B also a w/ adaptor
  Cantata Otique M  
  Candenza (Solo) B  
  Prelude B  
  Harmony T-Spot A  
  Alto A,B dependent on Holder model
  Harmony A,B Glass Also
  Highlight 23 B,D,M Dependent on Holder Model
  Leko 11 B  
  Leko 18,26,40 B  
  MiniM B.D.M Dependent on hoplder model
  2200 Series B needs trimming
  2115 Series M  
  2250 Series A,B  
  Cadenza A,B  
  Prelude A,B Glass also
  Cantata 2271,2272 B  
  Quartet 2274,2275 B,M,D dependent on holder model
  Leko 3 B can use gobo rotator
Selecon Zoom Spot Range A 1200W
Synchrolite   V 5 in a wheel
Times Square MR35 V  
  MR75 E  
  Q325 M  
  Q32 M  
  Q47 B  
  Q6 B  
  Q62 B  
VariLite VL2B   Triangle patterns
Zero 88 Focus M  
  From Rosco's Web = site.

Top

PAR lamps

  • PAR 36: Practically all the PAR 36 fittings are standard disco = pinspot=20 type with the very narrow beam 6V 30W bulb. Most typical bulb used is = VNSP=20 bulb type 4515, which has 5 degrees beam and uses 6V 30W. The PAR 36 = cans=20 almost always have a transformer built in, and the bulb has screw = terminals on=20 the back. There are also other more rerely used special PAR 36 lamps = used (12V=20 models, up to 100W models etc.). PAR 36 lamp diameter is 4.3 inches = (around=20 110 mm). PAR36 lamps come in a mega range of odd ball voltages and = powers for=20 things like marine and aircraft (for example 28V ACL version). = Generally PAR36=20 lamps are a bit shortlived on continuous duty.=20
  • PAR 38: PAR 38 lamp diameter is around 4.75 inches (around 120 = mm). This=20 type of bulbs have typically ES Edison Screw cap. Typical lamp power = levels=20 available are 60, 75, 80, 100, 150 and 300 watts. Typical beam spreads = are 30=20 and 60 degrees (special 12 degree bulbs exist also). This type of = lamps are=20 common in shop display fittings and security lights, also in outdoor = garden=20 lighting (special bulb version for outdoor use).=20
  • PAR 46: PAR 46 lamp diameter is around 5.75 inches (around 146 = mm).=20 Typical lamp power is around 200W. Bulb has blade connectors.=20
  • PAR 56: PAR 56 lamp diameter is around 7 inches (around 178 mm). = Typical=20 lamp power is 300W. Bulb has blade connectors. Typical beam spread is = 11x25=20 degrees. Different beam spreads are available. PAR56 lamps are = typically=20 available at 300W and 500W power.=20
  • PAR 64: PAR 56 lamp diameter is around 8 inches (around 203 mm). = Typical=20 lamp power is 500W or 1000W. Bulb has blade connectors. Typical beam = spread is=20 11x25 degrees. Different beam spreads are available. - MFL: ("Miffle") = Medium=20 Flood: 7 major lines in a criss-cross pattern. - WFL: ("Wiffle") Wide = Flood:=20 Many more than 7 major lines in a criss-cross pattern. - NSP: ("Nisp") = Narrow=20 Spot: Fuzzy - VNSP: ("V-Nisp") Very Narrow Spot: Clear

PAR64 Lamp Data

Mfg Lamp Code Color Temp (=B0K) Life (Hours) Beam Lumens Candlepower (Candela) Beam Angle (Deg) Field Angle (Deg) Watts
Q1000 PAR 64/NSP Narrow 3000 4000 8,500 180,000 8 x 15 14 x 31 1000
Q1000 PAR 64/MFL Medium 3000 4000 10,000 80,000 12 x 28 22 x 45 1000
Q1000 PAR 64/WFL Wide 3000 4000 13,500 33,000 24 x 48 45 x 72 1000

Par 64 Lamp Beam = Data

Distance
10'
20'
30'
40'
50'
Lamp
Center
Beam
FC
H
W
Center
Beam
FC
H
W
Center
Beam
FC
 H W
Center
Beam
FC
 H W Center
Beam
FC
H
W
1000 watt
NSP-narrow
1800
2.5
5.5
450
4.9
11.1
200
7.4
16.6
113
9.8
22.8
72
12.3
27.7
1000 watt
MFL-medium
800
3.9
8.3
200
7.8
16.6
89
11.7
24.9
50
15.6
33.1
32
19.4
41.4
1000 watt
WFL- wide
330
8.3
14.5
83
16.6
29.1
37
24.9
43.6
21
33.1
58.1
13
41.4
72.7

Top=20

Fresnel = Beam=20 Spreads

Instrument field angle spread multiplying factor
6" Fresnel model # 65Q
spot focus
16=BA
.28
flood focus
70=BA
1.40
8" Fresnel model # 75Q
spot focus
12=BA
.32
flood focus
45=BA
.91

Top

ERS Beam = Spreads

  • 6x9 - 37 degrees=20
  • 6x12 - 27 degrees=20
  • 6x16 - 19,25 degrees=20
  • 6x22 - 11,15 degrees=20
  • 8x9 - 20 degrees=20
  • 8x13 - 13 degrees=20
  • 10x20 - 15 degrees

Top

ERS Beam diameter as a = function=20 of throw distance

Instrument
Angle
Dist in Ft
8x16
5=B0
6x22
10		 6x16
15=B0		 8x8
20=B0		 6x12
25=B0		 30=B0 35=B0 6x9
40=B0		 4.5x6.5
45=B0		 50=B0 55=B0 60=B0
5
.4
.9
1.4
1.8
2.3
2.7
3.2
3.6
4.1
4.5
5.0
5.4
10
.9
1.8
2.7
3.6
4.5
5.4
6.3
7.2
8.1
9.0
9.9
10.8
15
1.3
2.7
20
1.8
3.6
25
1.2
4.5
30
2.7
5.4
35
3.1
6.3
40
3.6
7.2
45
4.0
8.1
50
4.5
9.0
55
4.9
9.9
60
5.4
10.8
65
5.8
11.7
70
6.3
12.6
75
6.7
13.5
80
7.2
14.4
85
7.6
15.3
90
8.1
16.2
95
8.5
17.1
100
9.0
18.0
27.0
36.0
45.0
54.0
63.0
72.0
81.0
90.0
99.0
108.0

Top=20 
--------------------------------------------------------------------=
--       =20
D.in|           &n=
bsp;           &nb=
sp; ANGLE (in degrees)
 ft.|   10    15    =
20    25    30    =
35    40    45    =
50    55    60    =
        =20
----------------------------------------------------------------------  =
     
 5  |   .9   1.4   1.8   =
2.3   2.7   3.2   3.6   =
4.1   4.5   5.0   5.4    =
    =20
10  |  1.8   2.7   3.6   =
4.5   5.4   6.3   7.2   =
8.1   9.0   9.9  10.8    =
    =20
15  |  2.7   4.0   5.4   =
6.8   8.1   9.5  10.8  12.2  =
13.5  14.9  16.2        =20
20  |  3.6   5.4   7.2   =
9.0  10.8  12.6  14.4  16.2  18.0  =
19.8  21.6        =20
25  |  4.5   6.8   9.0  11.3  =
13.5  15.8  18.0  20.3  22.5  24.6  =
27.0        =20
----------------------------------------------------------------------&nb=
sp;      =20
30  |  5.4   8.1  10.8  13.5  =
16.2  18.9  21.6  24.3  27.0  29.7  =
32.4        =20
35  |  6.3   9.5  12.6  15.8  =
18.9  22.0  25.2  28.4  31.5  34.7  =
37.8        =20
40  |  7.2  10.8  14.4  18.0  21.6  =
25.2  28.8  32.4  36.0  39.6  43.2    =
    =20
45  |  8.1  12.2  16.2  20.3  24.3  =
28.4  32.4  36.5  40.5  44.6  48.6    =
    =20
50  |  9.0  13.5  18.0  22.5  27.0  =
31.5  36.0  40.5  45.0  49.5  54.0    =
    =20
----------------------------------------------------------------------&nb=
sp;      =20
55  |  9.9  14.6  19.8  24.8  29.7  =
34.7  39.6  44.6  49.5  54.5  59.4    =
    =20
60  | 10.8  16.2  21.6  27.0  32.4  =
37.8  43.2  48.6  54.0  59.4  64.8    =
    =20
65  | 11.7  17.6  23.4  29.3  35.1  =
41.0  46.8  52.7  58.5  64.4  70.2    =
    =20
70  | 12.6  18.9  25.2  31.5  37.8  =
44.1  50.4  56.7  63.0  69.3  75.6    =
    =20
75  | 13.5  20.3  27.0  33.8  40.5  =
47.3  54.0  60.8  67.6  74.3  81.0    =
    =20
----------------------------------------------------------------------&nb=
sp;      =20
80  | 14.4  21.6  28.8  36.0  43.2  =
50.4  57.6  64.8  72.0  79.2  86.4    =
    =20
85  | 15.3  23.0  30.6  38.3  46.0  =
53.6  61.2  68.9  76.5  84.2  91.8    =
    =20
90  | 16.2  24.3  32.4  40.5  48.6  =
56.7  64.8  72.9  81.0  89.1  97.2    =
    =20
95  | 17.1  25.7  34.2  42.8  51.3  =
59.9  68.4  77.0  85.5  94.1 102.6    =
    =20
100 | 18.0  27.0  36.0  45.0  54.0  63.0  =
72.0  81.0  90.0  99.0 108.0      =20
----------------------------------------------------------------------&nb=
sp;

Power Formulas

Power:
Watts =3D Volts * Amps
Amps =3D Watts / = Volts

Sine Wave (VAC):
RMS Volts =3D 0.707 x = Peak=20 Volts
RMS Volts =3D 1.11 x Average Volts
Peak Volts =3D 1.57 x = Average=20 Volts
Peak Volts =3D 1.414 x RMS Volts
Average Volts =3D 0.637 x = Peak=20 Volts
Average Volts =3D 0.9 x RMS Volts
Top

DC voltage=20 drop of cable

V =3D voltage drop, I =3D current
R =3D resistance of conductor = per 1000=20 feet
L =3D length of conductor in feet
R for 18awg =3D 6.51, 16awg = =3D 4.09,=20 14awg =3D 2.58
12awg =3D 1.62, 10awg =3D 1.02, 8awg =3D 0.64

V = =3D I * L * (R /=20 1000) * 1.004
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Unit=20 conversions

inches =3D millimeters / 25.4
millimeters =3D inches * = 25.4
feet =3D meters /=20 0.3048
meters =3D feet * 0.3048

footcandles =3D lux / = 10.8
lux =3D=20 footcandles * 10.8

Centigrade =3D 0.556 * (Fahrenheit - = 32)
Fahrenheit =3D=20 1.8 * (Centigrade + 32)

pounds =3D kilograms * 2.205
kilograms = =3D pounds=20 * 0.454

degrees =3D 180 * radians / PI
radians =3D PI * = degrees /180

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Calculations for beam spreads,=20 distances, intensities and angles

  • The Beam Angle is the angle between the two = directions=20 opposed to each other over the beam axis for which the luminous = intensity is=20 half that of the maximum luminous intensity.=20
  • The Field Angle is the angle between the two = directions=20 opposed to each other over the beam axis for which the luminous = intensity is=20 10% that of the maximum luminous intensity.=20
  • The Beam Spread is a general term, describing the = angle=20 between the two directions opposed to each other over the beam axis = for which=20 the luminous intensity is a certain fraction of that of the maximum = luminous=20 intensity. The amount of that fraction needs to be given in each = specific=20 case.

3D"Beam
D =3D throw distance, V =3D vertical height, H =3D = horizontal=20 distance,
C =3D focus angle off horizontal, K =3D focus angle off = vertical,
F=20 =3D beam or field angle of fixture
X =3D beam spread (beam oval = width), Y =3D beam=20 oval length
mf =3D beam spread multiplying factor

Footcandles:
Footcandles =3D Candlepower / (D *=20 D)

Candlepower:
Candlepower =3D Footcandles * = (D *=20 D)
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Beam=20 angle multiplying factor (mf):
mf =3D 2 * TAN(F / = 2)
mf=3D F*1.8=20
mf =3D X / D

Beam angle (F):
F =3D 2 * = ATAN(mf / 2)=20
F=3D mf / 1.8
F =3D 2 * ATAN(X / (2 * D) )
F=3DX / (D * 1.8) =

Beam spread (oval width X if not straight = on):
X=20 =3D D * (2 * TAN(F / 2))
X =3D F x .018 x D
X =3D D * mf

Beam oval length (Y) (when beam hits surface at=20 angle):
Y =3D V * ( TAN(K + F/2) - TAN(K - F/2) )
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Throw=20 distance (D):
D =3D X / mf
D =3D SQUARE ROOT( (V * V) + = (H * H)=20 )
D =3D H / COS(C)
D =3D V / SIN(C)
D =3D H / SIN(K)
D =3D V = / COS(K)
D =3D=20 SQUARE ROOT(Candlepower / Footcandles)

Horizontal = distance=20 (H):
H =3D SQUARE ROOT( (D * D) - (V * V) )
H =3D V / = TAN(C)
H =3D D=20 * COS(C)
H =3D D * SIN(K)
H =3D V * TAN(K)

Vertical = height=20 (V):
V =3D SQUARE ROOT( (D * D) - (H * H) )
V =3D H * = TAN(C)
V =3D D=20 * SIN(C)
V =3D D * COS(K)
V =3D H / TAN(K)
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Focus=20 angle off horizontal (C):
C =3D ATAN(V / H)
C =3D ASIN(V = / D)
C =3D=20 90 - ASIN(H / D)
C =3D 90 - K

Focus angle off vertical = (K):
K =3D ATAN(H / V)
K =3D ASIN(H / D)
K =3D 90 - = ASIN(V / D)
K=20 =3D 90 - C
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DMX = Address=20 Calculator

DMX: = =

 

 

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