I saw an advertisment for LLL Reptile on Kingsnake.com that was for Repti-Sun 10.0 UVB tubes. When i went to the description, i found that they were linear flourescent tubes, not the compacts. It also stated that the UVB penetrates up to a full 20 in from the bulb, a definate plus for ig keepers due to our large cage sizes. I just replaced Kiwi's 4 footers so i think he'll have to wait a while till he gets to try these out. If anyone decides to try them out, post it here especially if you have a UVB meter!