I watched this yesterday, and it's inspired me to get back into my GameBoy, specifically I'm going to mod a backlight into one of my GBCs.
Firstly, as
sixteen-bit mention, you can't backlight a Game Boy Colour, only frontlight.
Secondly, while I'm hopeful it works for you, know that it may not look that good. I've had three mods done from two separate people, and one of them ended up looking pretty iffy. As a warning, these images make both Game Boys look brighter than they are
(with the better of the two looking eye-bleedingly vibrant).
Comparison
(LEFT by Apeshit Mods RIGHT by JustinThursday)
Apeshit
Apparently
Apeshit's was his first Colour mod, and it didn't turn out how I had expected it. The images and
video I'd seen from Bibin's mod looked a lot brighter and just generally more clear. While the mod looked alright at night, it looks like a regular Game Boy under normal lighting.
JustinThursday
The
JustinThursday mod was what I expected though, being comparable to Bibin's, brighter and more vibrant. It looks great in both regular light and in darkness.
Finally, for anyone who's curious about actually ordering mods, I wouldn't recommend either for this. Apeshit simply didn't have enough experience with them
(maybe he's worked on more now?), while JustinThursday was late to get my order out, and once it arrived, I was greeted to Game Boys that had been poorly packaged, with glue residue on both, some pressure points under the screens
(that fixed themselves after a few weeks) and dust underneath as well.