I looked at changing out the ballast in my old fixtures. The mag. ballast cost almost the same as a new fixture. Dont forget you also have to buy new lamps as well.
4000 lumens is brighter than 3000 lumes. Higher the lumens the brighter the light. I' ending up with 48,000 lumens.. will be nice and bright.
4000 lumens is brighter than 3000 lumes. Higher the lumens the brighter the light. I' ending up with 48,000 lumens.. will be nice and bright.