friendly reminder to clean your floresence ,hps,mh, or whatever lights you are using once a month to get full potential of your lumens and dont forget your reflectors . also it might be a good idea to do this when lights have been out for a few hours to prevent 1st degee burns .also to ad warm water without any soap residue will do the trick with a misting bottle and a clean white cotton towel to prevent scratching of the surfaces. okay i did my good marijuana deed for the day . hpe i helped someones plants take off thats been slow growing.