First of all congratulations on a great purchase! I have seen a vast combination of color schemes that really make this game pop! Colored GI looks great on this game. I had a pro for about a year and sold it, than recently I realized that was a mistake so im on my second one.

I really like the 3 color scheme with mostly green near the slingshots yellow in mid playfield and purple upper playfield next to sparky. I used 4 green bendable 44 style leds on the back of the upper playfield to light up the electrocution artwork.

I think green and purple fit the pro model the best due to the artwork. Maybe green, purple, and blue would be a great trio.

Almost all of the GI is 555 lamps. on the backpanel they are 44

Yeah, buy the pinbits plastic protector kit from Pinball Life. It costs about 30 bucks and really adds a great glow to the lower playfield. You will want blue or UV leds under them to make the plastics glow fluorescent green. It looks great!!!

cointaker offers Ultra Violet leds. you will want to get at least 4 to 6 of the 555 style. You may want to get the bendable ones too!

They used to have regular uv 555 lamps. Maybe they were discontinued?

Oh and by the way the leds under the slingshots are size 44. There are 4 of them, I did 2 uv and 2 cool white to light up the lanes. the 4 lower GI next to the flippers are definitely size 555. So a total of 4 555 uv and 2 44 uv leds will make the pinbits protectors glow bright fluorescent green!