Answer: phot

AnswerCrossword Clue
PHOTCameraman's occ.
PHOTLight unit
PHOTUnit of illumination.
PHOTLight unit.
PHOTC.G.S. unit of illumination.
PHOTUnit equal to 929 foot-candles.
PHOTIllumination unit
PHOTUnit of illumination
PHOTUnit of light
PHOTLight measure
PHOTLight: comb. form
photlight radiant energy photon photography
photunit of illumination, equal to 1 lumen per square centimeter