The FeatherBrite 21w full spectrum bulb is a compact spiral fluorescent bulb that has a standard screw in base. It is 5500k, 91cri with UVA 5% and UVB .04%. 1450 lumens. It is not dimmable. Our bulb is not a heat source, does not get hot (only a few degrees warmer directly underneath) and no burn in time required. 1 year warranty. Please check with your pet bird's veterinarian for recommended time of usage.
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