Commercial LEDs.
Note: High power (higher MW) diodes and more compacted diodes closer together generate more heat. Any LED light therapy device over 60mw and over must have fans and metal LED panels.

A commercial LED panel that has enough wattage and penetration power should have a cooling fan. This is the Lightwave cooling fan on their 2880 diode model. I avoid brands that have a fan built into a plastic casing. Based on all the brands I reviewed, plastic casing = plastic diode lens.

LED Penetration levels
TIER 3 LEDs – do not go beyond the epidermis
TIER 2 LEDs – can penetrate up to the dermis
TIER 1 LEDs – can penetrate up to the hypodermis

Warning: Most of the LEDs that I sell are to aestheticians on my site. So many aestheticians are buying residential LED panels for their clinic. These are often used with serums and are not using the FDA cleared wavelength. The biggest problem is bandwidth. If a company says their blue LED is a certain nanometer wavelength they failed to tell me the bandwidth. So, that 880nm Blue LED diode might hit 880nm for a split second but at its peak when the unit is actually turned on it is hitting 930 the entire time. The bandwidth can vary from plus or minus a higher number (the manufacturer should let you know if you ask, that is not in the fine print) with really high-quality diodes and way higher variance with lower quality diodes. Many aestheticians are buying the pulsed LED that is usually a plastic model with a plastic lens (not glass or silicone). They also don’t have fans and just say the wavelength and when I called and asked for the bandwidth variance they said they would have to find out from the engineers. What engineers? How come I can’t talk to them?

Also, they often show before and after tests with water-based serums but don’t show the results used with patients using the oil based serums that treat a different set of needs. I am sick and tired of these companies trying to get away with whatever they can and leaving out specific information that would make their LED look bad.
SLT diodes – Why are they so expensive for commercial use:
When an SLT diode says it’s at a 420nm wavelength, it’s 99.6 to 100% that wavelength. When a company says they have 420nm and they are not SLT diodes, it could mean 420nm + or – 10 to 15nm so that again is not fair to the consumer. It’s like if I set my oven to 350 when I bake something and it’s really at 315 degrees and it screws up my cake, I’m gonna be really upset and will return that new oven. So, whenever I call a LED light therapy company and ask them about their wavelength in nanometers, I want to know the variance. If the 420nm less than .05% that is acceptable to me. I always ask if the diode is plastic, silicone, or glass. This gives me a heads up on which type of LED concentration the lens can be adapted to.
When buying a commercial LED therapy light my best advice is to buy the same FDA cleared LED model that was cleared and the exact specs, not just them telling me that they use the wavelength that was done in the studies. I want to know the bandwidth and dosages and joules. I want to know everything. This is why I had to make this review. It can be very confusing when given so many specs and people don’t know when they are being misled.