Answer:

phot

Answer	Crossword Clue
PHOT	Cameraman's occ.
PHOT	Light unit
PHOT	Unit of illumination.

PHOT	Light unit.
PHOT	C.G.S. unit of illumination.
PHOT	Unit equal to 929 foot-candles.
PHOT	Illumination unit
PHOT	Unit of illumination
PHOT	Unit of light
PHOT	Light measure
PHOT	Light: comb. form

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.