These heavy duty transformers feature a photo eye for automatic on/off. Easy push button settings keep lights on from one(1) to nine(9) hours after turning on - or can be set to run dusk till dawn. (Two per case)
If you have a quartz sleeve make sure and clean it with acetone when you change your bulb to truly have a clean quartz sleeve. As a general rule of thumb, you should change your UV bulb after about 8,000 hours use. This is about once a year.
