Here's what Frances says about compacts and tubes. Obviously tubes sound like a much better choice. She has not gone as far as to compare different brands because she is still in the testing phase on the new lamps (tubes, metalH, and MVB).
UVB fluorescent tubes produce diffuse, low levels of UVB resembling outdoor shade on a sunny day. They emit less visible light than other bulb types. These tubes are suitable for supplying UVB to species that do not bask in sunlight, such as some forest shade-dwellers, or for small enclosures where the heat from mercury vapor lamps would cause problems with the thermal gradient. Always combine them with a better visible-light source. Quality tubes emit light with a UV Index between about 0.5 and 1.0 (sunlight in the tropics before 7:30 a.m.) at 12 inches (the usual maximum distance suggested), and they need to be replaced every year.
UVB compact fluorescent lamps also produce diffuse, low levels of UVB at basking distances. However, at close range and/or if reflectors are used, the light and UVB may be intense, making good positioning difficult. These lamps decay more rapidly than tubes and may need replacement after six months.
A few brands of fluorescent lamps for reptiles, both compact and tube types, have been found to emit hazardous shortwave UVB. These have caused eye problems such as photokeratoconjunctivitis. Some manufacturers that experienced the problem say they have addressed the issue, while others are still addressing it. However, if your reptile develops swollen eyes or refuses to open them shortly after a new lamp is installed, see your herp veterinarian immediately. You may wish to refer him or her to this article. Lamp placement, the lamp itself and/or other factors could be responsible.
Here's a sneak-peak at what she has to say in her report in regards to Arcadia 12% and Reptisun 10.0 Tube lights.
"I’ve attached my latest report on the ZooMed Reptisun 10.0 T8 (1” diameter) tube. When fitted with a reflector these (and the identical Arcadia D3+ 12%UVB) provide the equivalent of early morning spring sunlight (UV Index about 3) at a distance of around 10 inches above his back. These are the T8 tubes that come out the best on all the test results. This test report will be in the updated website when I get it finished."