Sorry EL I have to take FastJohnny's side here.
1) I do not live in a hot climate. In fact I can guarantee my lights will never be surrounded by 120f temps. So what the hell would I do that test for? And if it ever got that hot I sure as hell wouldn't be in the barn working on anything.
You don't, but many people here do. I've seen members from Las Vegas. Lubbock, TX. Phoenix, AZ. Barns and shed lighting in a working environment needs to operate during the day time and it gets hot like a parked car at the height of fixtures. Many people don't realize it.
2) He did the test in the name of science like you asked him to do. In fact you didn't even allow him to complete the time frame you asked him to before you started ragging on his testing environment.
I didn't ask him until like two days ago and he didn't mention that he had it running 24/7 non-stop until I asked. so I wonder... In any case, when they claim 60,000 hour life, one 600 hour test drive is not adequate especially when the selling advantages are efficiency and longevity and do not come with usable warranty to back it up. What if you were offered 100,000 mile tread life tires with no usable warranty at 75% the price of 80,000 mile tires from a reputable shop with a local warranty, but more expensive than 50,000 mile tires from them? No practical way to return and you only have one testimonial from someone who put in 1,000 miles. He doesn't have what it takes vouch for the main point. You see? Nothing personal.
The price isn't that good for something without a usable warranty compared to supply house drop-in LEDs with a 3 year warranty.
3) Lets just say the light gets dimmer after certain hours for what ever reason. As long as the owner doesn't care what is the big deal?
If you buy a brand new performance car and 2 years later, it dynos 30% less or it gets 30% lower average mpg than it did 3 months after purchase, you're ok with that?
What if the light gets dimmer but last 37 years like it says on the box? I guess we wont know because it hasn't been 37 years. And how are you going to find out if you never buy one and try it out?
It defeats the purpose, because you could have started off with a technology that do not severely degrade and use less energy. Premature severe degradation and failures have been issues with both CFLs and LEDs which is why Energy Star imposed strict warranty and performance requirements to qualify to have the label.
I read your posts and others in the lighting field and you guys are bashing LED lights. I don't get it? If the technology is going that way, which it is, then what is the point of steering everyone towards T8 or T5 lights.
Lifetime warranty brake pads, you just pay the labor.
Specification grade T5HO and T8 have proven long efficiency performance, life and reliability in harsh industrial or agricultural environment. They can handle getting left on from noon to 6PM in the hottest of the weather every day for years with minimal issues.
I built a new barn that needs lights. I started reading these threads and I am having a hard time sifting through whats BS and whats not.
They could be fine in Super Light Duty residential duty when they lights that average 30 minute a day on weekdays and 3 hour continuous use on weekends.