What is the temperature range?
The color temperature is from 2500-9000K, and the RGB color from 0-359; It will bring different visual experiences. One object will produce different styles. I have attached a video of the lighting changes.
Will this video lamp work with my canon rebel t7 2000D?
Sure. It has a cold shoe mount that will fit on the flash mount of the Rebel. You would just have to turn it on manually.
What voltage is the video light ?
Rechargeable battery installed, just need usb connection to plug cable into : 5v
does it hold settings when you turn it off?
No. Whatever you leave it at is what it stays at. If it does die from not being charged it will go back to stock settings. Well mine did at least but super quick to change it back to what you like. 1 minute tops to set up.