I asked an electrician the difference between 50hz and 60hz earlier this week. he answered 10 hz...on a serious note though I am involved in a project where the electric is 50hz...the 60 hz transformers worked fine after 3 days and showed no problem BUT I'm afraid of long term damage to the transformer or the lights. The client doesnt seem to concerned but I am. My remedy is to supply 220volt 50hz transformers which is fine problem is the lights are set up to run on 60hz... the lights are 12 watt LED spot and floods and mushrooms...the transfomers are Hadco 1500 watt and some 600 watts. I need help!