Thanks a lot for the info. Yes, I'll go to the shop on Monday and see what can be done, because it's an expensive lamp, it can't have all these problems.
I looked at Floraflex and here in Europe it has higher prices, the small lamp tells me a 650 at a price of 1100 euros. I can use a maximum of 300/400 Watts, I don't have much energy available. Too bad because I looked at the features and it really seems like a great tool.
For AliExpress you are really right, because my first cycle I used a led bought there for 60 euros and I collected 110g. Which even today I think there are many with such an inexpensive tool.