GE® Number 5 Flash Bulbs
Class M (Medium Peak)
EI Guide Numbers for 4-6 Inch Polished Reflector
For satin reflector open 1/2 stop.
For doors, open 1 stop.
For close indoor spaces, close 1 stop.
<=1/25 1/50 1/100 1/200 1/400
16 110 95 80 70 55
20 120 110 90 80 65
25 130 120 100 90 70
32 150 130 120 100 80
40-64 190 170 150 120 100
80-125 260 240 200 180 140
160-250 380 340 300 240 200
500-800 650 600 500 440 360

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