When using a photographic table for light exposure, what factor will I consider in selecting the right lighting? Is it the wattage of bulb or the lumens it will produce?

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When using a photographic table for light exposure, what factor will I consider in selecting the right lighting? Is it the wattage of bulb or the lumens it will produce?

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Dr. Md Rushad Rahman · Answer 1 · Jul 20, 2019 08:12:42

This is partly a factor dependent on the specific emulsion used, so YMMV. Some emulsions require UV light to harden, which is why you can find tutorials using halogen bulbs and sunlight to expose the emulsion. For emulsions that harden without requiring UV, you can use a wide variety of light sources like fluorescent tubes and LED arrays. Your lower limit on light intensity (lumens) is a function of how long you want to wait for exposure to harden the emulsion. The upper end is bound by two factors, burning the emulsion, which will mostly be a wattage problem, and bleed through exposing covered areas (lumens).

When using a photographic table for light exposure, what factor will I consider in selecting the right lighting? Is it the wattage of bulb or the lumens it will produce?

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