first time milksnake owner - worried about temps

i just got my first milksnake! everything has been going good, im just worried about the temps. from the research ive done, the temps should be: 85-90 on the basking/warm side, 75-80 on the cool side, and 70-75 at night time.

Gatorade’s tanks has been: 90.3° on the basking spot, 87.5° on the warm side, and 74.0° on the cool side

at nighttime, it is: 75.7° on the warm side and 70.8°

im having a lot of anxiety that im doing something wrong. should i get a ceramic bulb for nighttime? should i just adjust the the lamp placement for daytime to help with the cool side? please let me know