When I have the heat lamp on with the 60 watt bulb and higher the temps seem to be pretty much spot on going by the caresheet, especially the add ons for northerns. Cool end high 70s (ambient) and the basking spot is high 90s or low 100s on the actual rock and gets to around 110 on the fake rock I made (with the temp gun). Not sure what to do about that, would it be best to move the light slightly so it’s all on the fake rock and have that as the basking spot, though it moves it closer to the sideline the vivarium? That’s not really the main issue I’m having but if the difference is a problem then I’ll work on that too.
Anyway, the main problem is I can’t get the basking light to stay on, this then means the warm end drops to around the mid 80s and no basking spot. I have it on a dimmer thermostat as if I don’t it just gets way too hot in there even when dimmed if on all the time. I’ve tried various bulbs, at the moment I have a 40watt in and giving it a go but the basking temps don’t seem to be getting as high. Maybe moving it so the fake rock is the basking spot (now about 100) would fix that or I’ll lower it again. Also having checked on it this one is already dimming, I’ll leave it on for tomorrow and see what it does with a whole day of just that rather than switching bulbs but I’m worrying about if/when we get warmer weather, I guess I’ll be getting a 25 watt for then! Also, when it comes to lowering lights what’s the head clearance/height a skink can reach, I don’t want to move the bulb too low.
The vivarium is 4x2x2 and a wooden one with just the front glass if that helps


