Screech said:
wow, that's alot of bulbs. You are lucky they are not touching the ground.
You must be getting high hydro (electricity) bills.
All I use is just a desk lamp with a halogenbulb in it, and have it about a foot away from the board.
I lay the design on top of the photoresist and cover everything with glass. I expose it for 60-90 minutes. Anything less will make the design not appear as well, and if exposure time is too small, the entire design will rub off.
and another thing I do, since I mainly deal with boards less than 3 inches square, is use a quarter cup of water, and about 10 squirts of developer. YES, I said 10 squirts, because the bottle of it is expensive, and each squirt is better than each cup!
It takes about 10-15 minutes for the developing action to work, but it is to my advantage, because it allows me to buy the developer much later than I need to.