You can replace the red light with a Ceramic Heat Emitter (CHE), which emits no light and can be on 24/7.
Most people don't consider UVB lights necessary, but I like to use them anyways. Snakes can see UVA, so not using a UVA/UVB light means that part of their vision is constantly missing in captivity. Plus, some snakes come out and bask more under UVB lamps if they're goven the option. UVB lights don't produce much heat, so they're not a replacement for a heat bulb.
As a side note, are your heat sources regulated with a thermostat (different than a thermometer) or a dimmer? If not, you'll want to get a thermostat/dimmer ASAP, as without it your snake can suffer from burns. Also, how are you measuring surface temperatures?
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