Amazon.com: Game Boy Advance SP Drop-In 3.0 IPS Backlight LCD Mod Kit For AGS 001 & 101 [video game] : Video Games
Enhance Nintendo Gameboy Advance SP Solid Blue Color Console: IPS V2 Backlit Screen & 10 Level Brightness - Etsy
GBA: Backlit SP model comparison - YouTube
I have two Gameboy SPs, and one has a really nice and bright screen with 2 brightness settings... the other only has an on and off setting for a much weaker backlight,