Hi AVB,
You could be right there. I know the quality is probably not good but I can't resist the price. Same old story that puts quality manufacturers out of business. I have tried another bulb and cover but got the same thing. I think I'll give up on trimmers. They're very fussy and some models take a lot of time to dismantle. They also cost nearly the same to buy at the recycle centre as a lawn mower. I only took them on because I am having trouble getting lawn mowers to play with.