While searching for the brightest bulb for a 35w setup (OEM ballast, wiring), the best came out to be Philips 85122+.

I took out a light in the car, and read the label as also Philips 85122+. So, I question if these lights automaticly come with our RX-8?

I bought my R3 used, so I don't know if it came with the 85122+, or was later replaced 85122+.

 

That's stock.

The 85122+ is your main driving HID bulb, just to clarify, and you would do better replacing the fogs with an HID kit. Even if you found a brighter bulb to replace the 85122+ I wouldn't think that it would be brighter than if you replaced the fogs. That's just me. . .

The stock bulb is a 4700k, right?, check out something that doesn't exceed 6000k. Higher gets a pretty/annoying color spectrum but you loose a little brightness as a result.

 

Okay. I was just wondering if the bulbs came stock.

Interior lighting was already changed to LEDs. UV Dome, Doors. White map, vanity and glove lights - I wanted to keep lights that I might use functional. I need to swap out my red footwells to UV.

I was going to replace the fog lights with a 3000K, 9006 bulb, 35w ballast V-LED kit for the fog lights. I decided against that and to return both kits and the D2S replacement bulbs to V-LEDs. Mostly because I read a lot about HID lights - Kits, bulbs, ballasts, wiring... It's not fair to the other drivers to be blinded. I don't like it when people blind me and I can't see sh*t.

The 85122+ bulb is 4300K, it's the brightest bulb available for the D2S.

You did answer my question - it comes with the car from the factory

 

I was pondering the same idea with the fogs and again with a 3k. I'd like to match the headlights but as you said it would blind other drivers. My thought was that with a 3k it would not be as bad? Kinda... Right?

I also returned bulbs to v-leds when trying to figure out what worked best for the interior. Lesson learned is that the x2 bulbs are bright as **** and waaaay too much for interior applications. At least in our cars.