mysnakesau
Almost Legendary
my tank is about 2mtrs long got a heat mat at warm end thats on a timer and a 60watt bulb in there is that good
You can tell by watching your snake whether the heat is right, but you should invest in a thermometer so you can keep an eye it it properly.
Your snake should move about the enclosure to regulate its heat. When it gets hot it will move away from the heat towards the cool end. If your snake is spending all its time at the warm end, under the light that should tell you that he isn't getting warm enough to need to move away so should increase the heat a couple degrees more. If you need to increase the heat change the bulb for a larger wattage. If your snake is spending all or most of its time at cool end, the warm end is too hot so suggest changing the bulb to a lower wattage.