Radiant heat panel, heat tape or ambient temperature?

Wondering what you use for your heat source on your retics? Also in the comments please describe your room temperature winter an summer ....

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My retics are in 78x30x18 cages, each heated with a 150watt ceramic heater about 12" from one end. The room they're in gets 70-71 summer time and down into the 50's during winter.

No retics, but I have a 7’ boa in a 8’x30”x18” Monster Cage, 2 rhp on one end (Pro Products PH12C panel, recommended by Bob to use two instead of one larger one). Ambient in room is 72-75F in winter, 75-77F in summer, cage stays 77-80F in the cool end and 88-90F warm end year round.

Ambient room temp if you have a lot of snakes is the best way to go, however if you only have a small collection then between the two of heat tape and heat panel I prefer heat panel, but heat tape is a cheaper route and it doesn't affect the humidity.