Title: burns out after a couple of hours
Review: I bought half a dosen of those for a project at work. Plugged them in and left on for a couple of hours. Most of them burned out even thought it was in a regular office enviroment with conditioned power source! All LED's became dim. To get to higher power, the manufacturer probably operates LED's above the allowed current limit, which results in very short life time of the device.
Is this product review negative?