I have one of the cheaper ones. You can get them off ebay for about $20, think I bought mine for about $10. Comes with built in magnifyer. I find I never use it, but I never tie small flies either. I too have as many lights on as possible.
Actually, I may try and get one of those Ott lights. Want to find a few more that have actually USED them. Have seen them, tied under one at a show (but, tons of lights around anyways). But want something different on my bench. Don't like the clamp and swing of the one I have now.
"Good angling ethic is not a monopoly practiced just by fly fisherman" - Bill McMillan