Found these to be really reliable. Well made and does the job. Very satisfied!

Bought one 2 months ago, when 4 brand new bulbs failed to work in the unit I decided to check unit itself and discovered it was blowing fuses both in the unit and thermostat. Upon opening the unit to check wiring I was horrified to discover that the plastic coating on the wires had completely melted away exposing wires and allowing them to touch, hence blowing the fuse. If wires had not touched but merely continued to heat and burn I dread to think what may have happened.