I respect perhaps as a service technician on details that are not seen directly as a deficiency and occur only after a certain period of operation.
So such as the wiring of lamp !!
By the waste heat of 130W bulbs that dinky terminals on the base and a clearance between the lamp base and ceiling of grad times 0,7cm, you have a small oven on the ceiling!
Big downside is just that the wiring does not join the long. The insulation is brittle wires break off at the base, etc.
So I had to repair the lamp for charred wires after one year and a burning time of max.1Std / day. Equipped with completely new lamps and heat-resistant wires should now nothing more stew (Addendum 31.08. That was probably nothing! Had ran again, this time the thing is off, fed up !!)