Hi this is my first post to the lighting forum. I have a set of Mac600's one of which stopped working a few days ago. I checked the fixture to find the error message: LErr, which I found out was lamp error from my manual. I was slightly confused by the instructions, and I assume that it means the bulb itself is burned out. I saw another solution that I didnt understand. Im going to read through the instructions again, but I thought that if anyone had experienced this error, I might get some help. If it is a bulb then I have a replacement on the way already, and I need some tips on changing the bulb. Any info. would be of great help.