Hi,
yes, the night starts at 1min and 15sec and by getting upgrade materials either by buying them in shop or from running you can upgrade the camera to get more credits during the night, enable x-ray, extend night time and retain relationship level after loop reset.
To access the upgrades, simply click/tap on "Cam" icon visible on PC screen between the nights and then click/tap the second tab at the top to see all available camera upgrades. Each upgrade will tell you which and how many materials are needed.
Hope this helps,
Cheers