We with two other breeders tested:
Capture the Sun by Big Apple 100 watt Flood
Capture the Sun by Big Apple 160 watt Flood
Active UV Heat now T-Rex 160 Watt Flood
Active UV Heat now T-Rex 100 Watt Flood
Active UV Heat now T-Rex 100 Watt Spot
Powersun by Zoo Med 160 Watt Flood
Powersun vy Zoo Med 100 Watt FLood
Repti-Sun 5.0 Tube
ESU coil
Solar-Brite 160 watt Globe MV
We still need to test the High Noon Mercury Vapor by Nature Zone
All were tested at the recommended minimum range (6inches for tubes, 12-18 inches for MV)
The ESU and Solar-Brite did not put out much UVB when new, 1-3 readings and I would not use these on bearded dragons.
The Tubes were okay when first on, but dropped dramatically and at 3 months, to the point I do not feel they were very effective at all for bearded dragons, but good for an animal that needs less UVB or is supplemented regularly with Calcium with D3, so we give 'em to the water dragon 
The Active UV Heat (this was prior Zoo- Med) put out the strongest reading, equal to a typical day in Northern Europe(that kinda puts to rest the theory of too much UVB) and maintained the strongest reading over time, still producing equal to the other MV in the beginning reading, when it went off 14 months later. Unfortunately, since then all the Zoo-Med we have had, have not held up like that one.
PowerSun readings ranged 9-12 over the time we checked them, but again, all went off 3-4 months after first using them but one that lasted 9 months and still producing more UVB than the tubes. This was equal to a VERY overcast day in England.
Capture the Sun was about equal to PowerSun, but dropped faster in output by the 3 month mark when they also went off and had a lot of problems with light fading and going out and returning over the time used. Seems the PowerSuns are doing this now also.
The one spot we tested, had about 3 times as much UVB, but equal to a overcast day in Florida, again we lost it around 3-4 months.
At that point we figured our area was experiencing power surges and this was affecting the lights causing early burn out. But at the point they stopped lighing, all had more UVB output that the tubes did in the first few weeks. Whatever the reason, power surges or the light just themselves not being the quality to last the hours they stated, it was impossible to continue the study for very long.
NOW all this said, I still use PowerSuns and Active UV heat, they may not last as long for us, but we feel they are the best available at this time.... just need to find what the one Active UV Heat had that lasted when the others don't!!!
Check back on my site in the next day or so, because testing on a brand new Capture the Sun mercury vapor bulb will begin this weekend! I hope these bulbs test well because there is a need for a low cost mercury vapor bulb. Zoomed's Powersun and T-Rex's Active UV cost considerably more. I will get started on testing those two bulbs this fall!
