In our neck of the woods we backcharge the supplier of the fixture. Your supplier will honor this if they want to do buisness with you. On a recent job we had a high ballsat failure rate. They were Hatch ballasts mounted in Zumbotel fixtures. Zumbotel sent out a rep and paid us to change ballasts in 50 of the fixtures. Same job had several hundred FCI compact flurescent high hats that failed at various times during the warranty period. The fixture manufactor balked because the ballast manufactor went out of buisness. They were replaced with advance ballasts with the costs split by supplier and fixture manufactor.On change order work we also add a percentage in for warranty.
Charlie
