So this is probably a stupid question. So the heating pad I have does not get hot enough for my day temps, so I use the overhead lights to heat up during the day, then turn them off at night. Well for a while I was using 100 watt day bulb (I also have the 100 watt night bulb). With the heating pad on during the day my tank only gets to about 78-80 in the hottest part, with the night bulb AND heating pad it gets to about 84-86, and with the day bulb and the heating pad it gets too much over 90 so I haven't been using it. But I also feel that the 86 isn't hot enough. If I get a day bulb that is less watts, will it not give off as much heat? I think they come in 40,60,80 and 100 watt. If it's true, which should I get to keep my tank around 85-90 during the day? It's 20L gallon btw, glass.
Thanks!