I know i dont have an accord but it should be about the same except my chrome piece that i painted black came out of the headlight so i had very little masking to do. I did not remove the chrome and just primered and painted over it. I have had it like that for over a year and they look great. Not a great pic but i happened to have the link, well worth the time to do it
I didnt notice any light decrease but than again i have these

I love my HIDs