What he means is PS3 is wired for LED lights. PS2s might be LED, but most are probably incandescent. So you might have to change the lights.
I have rans new lights in PS1 shells to LED. They can be popped out if you are careful.
You can also snip the wire on the incandescent light, leaving the light in place and then point the LED towards it.
Start watching this video at the 1:35 mark.