Editing all lights in same time

Hello, sorry if that’s wrong place for asking, but i didn’t see any better one.
I’m making my first game, i already did some closed spaces in it, and now i decided that the lights there should be more intense. So i would like to change all lights intensity without regrouping and clicking it around for an hour. Is there a way i can select them all (i know it is) and change intensity of all of them at once (can’t find it)?
Thank you for spending time reading my bad english :wink:

And once again, hello everyone :slight_smile: I will write here from time to time, not always with troubles xD

EDIT: Not actual. I found a soulution.