I have used both.. I am using a mvb on my water dragons and don't see any difference between the two types of bulbs. I have over the past few years used most types available and I think its a person preference. The all in one is a good idea, it makes things easier, but those bulbs do get very hot, so be very careful when you are working near it or if you have children. I have noticed one thing with these bulbs that concerns me. When I am in direct contact (within 6/8 feet of where its located) my eyes hurt and I get a bad headache, I never had that with the other types. I also took a nasty burn just last week, because the lamp was not secure and it was about to drop, so I tried to catch it.. big mistake. So good luck with your research, Either way, I wish you well with your reptiles.

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