I am setting up an 18 gallon bin for my dubia colony. The roaches will be here Saturday so I am trying to get the bin dialed in for heat. I cut a hole in the top and put some screen over the hole for a vent. I ran a thermometer through the side and have it hanging midway down the bin. It is sitting on top of a 12 watt heat pad. There are no egg crates inside and the ambient is measuring 75 degrees however the floor that is over the heat pad is at 90 and the other end of the floor where the food will be is 78. With the egg crates in will this temp be ok or does the air temp need to be up between 85-90? The heat mat is at full power so if it still isn't warm enough should I switch to a lamp? If so what wattage? The ambients in that room fluctuate from 69F in the mornings to as high as 77F during warm days.

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