Thermal test of 30W (25W) high bay light.

This was filmed on a Moto G phone, so it'll sound a bit different from normal. I put a couple of thermocouples into the light I took apart in another video, and let it run for several hours. The temperature rise on the ballast and LED housing is actually very low. Just 20 degrees above ambient. The huge finned heatsink seems to do a good job of dissipating the heat from the LED.
Note that none of the light from the lensed LED assembly even hits the reflector. I'm not sure if it's there for dust or airflow reasons, or because people find it easier to switch to a high bay light that resembles traditional ones.