For a baby you must not go below 75 degrees at night just because they can handle it does not mean they should be put through it. To far of a temp drop can cause stress and make them stop eating. I reccomend that you buy the infrared if at night the temp drops below 75 in the enclosure. The bulb will not affect the night time cycle of your frog. Babys especially shouldn't have large temp drops at night. Best is only a drop of 2 to 3 degrees from the 80 degree daytime temp. They are capable of handling a lot but you must prevent as much stress as possible.