i use 2 red bulbs( both for night and makeup heat) and my daylight bulb is a mainly uvb light and to be honest with you unless the light is rated for a dimmer id get rid of the dimmer switch and go down in your wattage . I am an licensed electrician and dimmer switches do 2 things on a bulb that's not rated for one. It can cause a fire because of low amps and it can shorten the life of your bulbs. As far as the uth goes if you sized it right for the tank raising your tank off the ground will allow for convection of the heat( most come with small silicone coasters to raise your tank up off the ground anyways ) and a good thermostat will regulate the heat as well. My trade is heating cooling plumbing electrical and refrigeration . I'm pretty good with regulating heat lol.





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