I'd like to weigh in on the practical economic questions of switching to a SunCure operation. With space constraints I like the idea of hanging the light rig from pulleys in the glassing room. You get to use the room for glassing, curing, even shaping. The beauty of this system is... You glass a board under incandescent light until you like the glass job. Then you expose the board, without moving it, while you drink some coffee. Then you sand the glass job, apply hot coat... and keep working on the same board. You don't have to keep playing musical surfboards while the resin cures for hours in a separate curing room, and your customer waits impatiently. You could work on one board, in one room, til it's complete... then ship it... then start the next board. Any operation could survive on a much smaller building and inventory investment. You can save the hassle and expense of the MEKP- required OSHA license, and the random inspections. Plus, you can add a few years to your life by not breathing that crap. The proposed lighting expense would be offset as you save the current labor and material expense of sanding, grinding, and replacing glass and gloss jobs which kick before you're ready. Plus, your product should improve. The lighting expense in larger operations would be offset by the cost of cooling the glassing room, or heating the curing room. For SunCure you want roughly even exposure of surfboards to UV light. If you were to use an indirect (skylight) UV source, you would have to devise a way of properly diffracting bend-resistant UV light from a moving sun without degrading its intensity. Practically, this feat would be impossible. The sun's intensity varies greatly with clouds, and it doesn't shine at night. If you take the skylight advice, ask for flowers... or at least candy. For smaller operations, I did some local research. I've exposed small areas of UV resin with just a shop light. It takes maybe fifteen minutes. You could build a light box with 34-40 watt standard 48" flourescent tubes. They cost as little as a buck each. The ballasts cost about $10 for each two tubes. The light box would require more bulbs, but you could make the box length span 12 ft with only one bulb size to maintain. Add more bulbs for shorter exposure times. You could wire the lights to isolate on chosen areas of a board under repair, or shorter boards. The beauty is that all the parts are cheap and easy to find. Fifteen minutes of electricity probably won't run as much money as rent and electricity on that extra surfboard storage facility, I mean curing room, you won't need. Buy some PG&E stock, and go at it.