is an essential part of all LED fixture designs. And while it is important to make sure that the LED fixture is well designed to protect from internal overheating, one must also take a closer look at where the fixture is being installed.
The heat outside, in the air surrounding an LED fixture, can be hazardous to fixture survival, reduce light output and cause accelerated system decline.
An LED fixture with a driver, designed for a lifetime of over 100,000 hours at 38˚C/100˚F, if installed in a high ambient environment of 66˚C/150˚F can cause fixture driver failure in just a few months. And an extreme ambient temperature of 100˚C/212˚F can shut down most LED fixtures in less than an hour.
The determination of accurate ambient temperatures combine a balance of environmental factors (seasonal changes in temperatures), system design, fixture power sizes, and a range of usage conditions (day-only work schedules or 24x7 operation). One must first establish some baseline temperature conditions for the space around the LED fixture in the actual installation site. This means getting real-world temperature measurements. You must know how much the LED fixture will heat up if located in that temperature.
Heat evaluation of LEDs and Drivers in a fixture.