The question of UV lighting is so complex. I keep alot of monitors and I find myself continuously revisiting questions on to use or not to use and then questions over which one will produce the best value for $. That website quoted above is a great site for researching but wish they would update some of the globes available.
First is to decide whether to use UV lights or not. I kind of looked back abit into the past and think many keepers before all the brands came out were using types that produced very little to no UV so it sort of begs to question do they really need it? If they were so successful on these set ups (that produced little to no UV), one has to wonder about the benefits.
I decided to go for UV lighting, more so on the belief that if I didn't Ill probably be the one that loses the alot. So I guess like many keepers its a comfort thing for me not wanting to take the risk. So the next question was what one will produce enough UV and how much is enough? I dont think people are in a position yet if ever to answer how much is enough. Trying to kill two birds with one stone and not wanting to pay extra for set up and regular replacement of tubes I went for the MVBs. I brought a few OzBright globes which at first were great for my needs, produced UV, were very bright light, and allowed me to maintain very high temps on the basking spot. But then they changed the design which changed everything. Not only could I no longer maintain my temps anymore, they regularly blew (after about 2 months). The main problem was that to maintain my temps at the basking spot (65 - 70oC) I had to lower the globe to about 12 cm from the surfaced which put the UV output at that distance to a too high level. I was kind of surprised to find out that these globes and Aussie Sun MVB and Zoo Meds Power Sun are all the same globe produced from china just packaged differently. Sometimes on the Aussie Sun and OzBright globes you would find Zoo med stamped on the neck. As for the Sun Seeker Im not 100% I know a few dragon breeders use it with success but to my knowledge no test to back it up everyone assumes its crap because its cheap. Lately Ive been using Solar Glo but not really 100% happy with, but as I dont own a meter Im only guessing and showing trust into the globe, for all I know it could be producing nothing but so far seen no decline in activity and health.
If you are after the best, top of the line, $$ is no barrier than MegaRay will be your globe. At the moment Im um-ming and arr-ring over whether its worth the extra cost which I find is MegaRays biggest hurdle on the market, especially for me as I have about 9 cages to fit out. The most common problem with all these globes (referring to MVBs) is that they are very fragile and easily blow if the power supply isn't stable and reliable. If say they charged $50 a globe everyone would be moving over to them no doubt. I think the tubes can still be useful but having to replace them at $30 - 70 each every 6 months isn't the best and most efficient way to use your money.