The lamp is very bright and quickly reached its maximum brightness. For me there was no whistle, stink or flicker. The processing can still much to be desired: My bought in September pear is now in April already broken. An energy-saving lamp should persevere on average 10,000 hours; when I was just under 10% of it closing. Since match price and performance simply do not mix.
Successor is probably an Exo Terra Repti Glo 2.0 - which is indeed noticeably darker but runs dafürr in another room for over a year excellent ...