PRG Best Boy 4000 User Manual - Manual (Page 92)

84 BEST BOY 4000 ® SPOT LUMINAIRE USER MANUAL
Medium Field of View
Iris Full Open
38º Full Angle
19,100 Field Lumens
Throw Dist. (Ft) 20 30 50 75 100
Beam Dia. (Ft) 10.7 16.1 26.8 40.2 53.6
Illuminance (fc) 228 101 36 16 9
---------------- ---------------- ---------------- ---------------- ---------------- ----------------
Throw Dist. (m) 5 10 20 25 30
Beam Dia. (m) 2.7 5.4 10.7 13.4 16.1
Illuminance (lux) 3640 910 228 146 101
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