Force of light at rollsings

Hello! I'm from Poland* and I am making lot's of polish add-ons, general from Krakow. I made rollsings from Krakow, and they are beautyfull, the best in night. And I have one question - It's possible to change force of light at rollsings? Actually they are too dark



*Sorry fo my English, I am learning it

You can edit the appropriate light textures: linienbeleuchtung1-3.bmp and zielbeleuchtung.bmp.