PRG Best Boy 4000 User Manual - Manual (Page 91)

BEST BOY 4000 ® SPOT LUMINAIRE USER MANUAL 83
Photometric Data
Narrow Field of View
Iris Full Open
9º Full Angle
19,100 Field Lumens
Throw Dist. (Ft) 20 30 50 75 100
Beam Dia. (Ft) 2.4 3.7 6.1 9.2 12.2
Illuminance (fc) 4281 1903 685 304 171
---------------- ---------------- ---------------- ---------------- ---------------- ----------------
Throw Dist. (m) 5 10 20 25 30
Beam Dia. (m) 0.6 1.2 2.4 3.1 3.7
Illuminance (lux) 68500 17125 4281 2740 1903
Multiply throw distance by Tn to find beam diameter.
Divide cd (candela) by distance squared to find center beam illuminance.
Dist. in Ft. = foot candles
Dist. in meters = lux