Conventional Fixtures Beam Spread for PAR Units

[w8tah]

HI Folks:

Working on our Christmas program. This year my worship leader has asked me to do a couple different things, and so i need a bit of help.

I am wondering what the beam angles are for PAR 64 bulbs WFL, MFL, NSP and SP (i think i have those classifications right) Ive only ever used WFL and MFL bulbs. If someone can either point me to the appropriate reference or shoot me the numbers i would really appreciate it.

TIM
Lighting Designer
First Baptist Church, Medina Ohio

 

[derekleffew]

Buy an iPhone or iPod Touch. Download LIGHT CALC from the iTunes Apps store for $4.99.

OR

Download this Excel worksheet from my website: Conventional_Photometrics.xls.

To answer your question directly:
BEAM ANGLE
1Kw PAR64 VNSP- 6° x 12°
1Kw PAR64 NSP- 7° x 14°
1Kw PAR64 MFL- 12° x 24°
1Kw PAR64 WFL- 24° x 48°

FIELD ANGLE
1Kw PAR64 VNSP- 10° x 24°
1Kw PAR64 NSP- 14° x 26°
1Kw PAR64 MFL- 21° x 44°
1Kw PAR64 WFL- 45° x 71°

For photometric formulas, see this Collaborative Article: http://www.controlbooth.com/forums/collaborative-articles/7664-mathematical-formulas-lighting.html.