Hi, JACustomer. I have been a Veterinary Nurse for over 15 years and I'm happy to help. Please stand by while I have a chance to type.
Thanks so much for your patience in hearing back from us. The most important light you will supply to your companion will include UVB rays production. This can be done with a bulb that is broad spectrum or gives off just UVB light. The day lamp can be replaced with a UVB lamp. Be sure that ALL of your UVB bulbs are replaced at 6 months of age, as they tend to decrease their UVB ray production after this time. I also want to mention that it's important for your companion to have 10-12 hours each night of darkness. Red bulbs can be stressful to dragons, so it's best to use a ceramic heat emitter at night that gives off heat but no light.
The strength/wattage of your bulb will depend on what your hood calls for. The most important thing is that the UVB bulbs be 8-12" from your companion's basking spot, are 6mo of age or less and that the temps are correct in the habitat. My personal favorite UVB bulb is this one: https://www.amazon.com/Zoo-Med-PowerSun-Mercury-Vapor/dp/B0002AQDJK
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