Quote Originally Posted by Monophoto
When you look at it this way, the energy cost doesn't seem so significant.
The energy costs are just part of the equation. Leaving the tube bank on creates additional heat, makes it difficult to use the roon for other purposes, say coating and dryng of exposed material, and would not allow use of my integrator system.

From my perspective, the *only* advantage to leaving the lights on continually is bulb life. From the perspective of consistency in exposure there is no advantage at all since regular tubes reach full output within a few seconds of being turned on.

However, in workshp enviroments where several people are using the same light it makes sense to me to just leave the exposing unit on all the time, assuming the room is not being used at the same time for coating and drying of light sensitive materials.