Honestly...You should just go with a regular white household bulb for your heat. Start with one with wattage that you think would give you the correct amount of heat for the size of your enclosure.
I don't and never have used "Reptile" heat bulbs on any of my lizards....especially colored bulbs. All you need is a good
UVB bulb and a regular house bulb for heat.
What size is your enclosure and how are you measuring the temps?