Situations are different for continuous use LED vs those that only needs to stay on for a few minutes per hour. Many LED stuff (flashlights, security lights, bulbs..) often utilizes LED element fry out protection which is essentially a thermostat which controls the wattage going into LED elements to maintain a constant heatsink temperature once the threshold temperature is reached. It's kind of like hot plate. You power it up and the heater stays on, then it cycles on and off to maintain the temperature. Since "on and off" isn't reasonable for lighting, dimming ballast is activated and reduces LED wattage to maintain the heat sink temperature.
Something that's often omitted in spec sheet of high output LED screw in bulbs is that they're often unable to perform at rated output for more than a few minutes. The inherent limit in LED bulbs mean that they either operate at full output to a certain temperature and become a lower output bulb for most of the running time, or the elements and/or the ballast burns out. This is deceptive for continuous duty lighting, however it's fine for lights that normally only operate a few minutes at a time. This can be tested prior to a large scale deployment by placing a sample LED fixture in a small jelly jar fixture and operating it continuously inside a covered bucket (to simulate high ambient) while monitoring input wattage.
A smaller power lamp (40W equivalent/4W input or so) can often handle continuous operation at rated output. Larger lamps like 1600 lumen/100W equiv will dim down or fry out, even if rated "totally enclosed". Unfortunately, they often fail to disclose that it can not maintain full output while in a sealed fixture.
