Nighttime temps - heating pad

[Pugs&Dragons]

It's been getting chilly so I bought a heating pad to keep my beardie warm at night but it works better than i thought it would! It's not directly under her sleeping area but because it radiates it gets in the low 80s where she sleeps. Is that too warm? If I don't use anything her tank drops to low 60s / high 50s and I know that's too cold. Any advice is appreciated.

 

[PatsyB]

The tank should be around 70 at night. They need a cool down period to recharge their brain.