The post above yours was written by "John" who is John Hayes at URI (Ultraviolet Resources -
Ultraviolet Resources International - UV Tanning , Lotions, Lamps, Equipment, and More).
If you value your time, want a good recommendation, want a good price, don't want to be jerked around - call him.
He has been on the boards helping (for free) for years. I have never, ever heard a bad word said about him by anyone. And I have personally used him for my salon since I opened and sent LOTS of customers his way. 100% satisfaction, every time.
Not saying there aren't other good ones - there are. But no matter HOW much time and energy you invest in trying to "figure it out yourself", you are never going to know as much as John (or other really good lamp guys). So do yourself a favor, call him, tell him your equipment, current lamps, your goals, budget - and take his advice.