I would think the quality of light is what determinate the ability and extension of it's use.You cannot classify led as all led imo.
The difference between one and another is night and day.
Kessils are point source led clusters. While most of the others are not point source but spread out.
Just as some metal halide bulbs are not good for growing coral, like a 4000k bulb, the same is true with led.
" We often think of LED lighting as relatively new technology, yet the ability to create electroluminescence was discovered in 1907. It wasn’t until 1951 that the first LED lights were created, primarily for commercial and industrial purposes."I would think the quality of light is what determinate the ability and extension of it's use.
The quality of LEDs can't change. The lenses are what makes their angle different. That's all.
just saw this post, maybe you should check these lights out. (www.focustronic.net). They may give you a second view on LED as primary light source. Agree that LED is only as good as its lenses but a different story when you have an add-on technology to help with LED's disadvantage alone.Some could argue that an LED is only as good as its lenses, and it would be an argument with merit. Lenses make a huge difference in how LED light is disbursed. Ecotech (which my auto-correct swears is Scotch) hopes to revolutionize lens technology with their upcoming hemispherical lens. We will have to see how the new lenses perform once they are released. One thing worth noting, it takes a lot of time to really notice subtle changes in how a lighting type performs. For a while, even for several years, things can seem relatively in line with previous results, but as our tanks evolve and we closely monitor coral health, it's often then that shortcomings become apparent. My point, aquarium media and various aquarists may very well claim that Ecotech's new lenses (or any new product for that matter) has sealed the gap regarding LED lighting concerns, but in reality it will take a long time and the reports of a lot of reef keepers to really paint a complete picture.
One thing worth noting, there are so many variations between individual LED diodes, lenses and configurations, it's impossible to pan LED lights as universally insufficient. In fact, if an aquarist invests time and effort into monitoring their PAR readings and carefully placing their corals while using only LEDs, chances are they will achieve good results.
An LED from one brand is not the same as an LED from another brand. Even from with in a Brand one LED from one bin is not the same as an LED from another bin." We often think of LED lighting as relatively new technology, yet the ability to create electroluminescence was discovered in 1907. It wasn’t until 1951 that the first LED lights were created, primarily for commercial and industrial purposes."
So your saying that since 1907 when LED's where first discovered they haven't changed?
For several months after this article I wound up fielding questions as to why the photons from leds weren't any good.I think it's kind of silly to question if LED only can be used successfully in 2017. For almost decade (or more?) now many reefers have successfully used LEDs for a primary or only light source.
An article/research would be better spent on how to properly use LEDs as a primary or only light source. What style is better, puck, clusters, spread out, diffused, lens angels, brands, which color spectrums of LEDs are benificial, how many, does par = par etc etc etc. There's a huge topic there.
As to the topic I kind of have a hybrid where my T5 is my primary focus but my LEDs are my primary light source.
I use RapidLED fixtures and my coral growth just explodes. I love that Company! GREAT customer support too.I have 2 65 gallon reef tanks. One tank I am running T5's and metal Hailides and the other tank in running LED's. Both tanks have SPS and LPS but the tank with the LED's everything grows like weeds. I have even gone as far are buying 2 of the same frags and putting one in each tank and with in weeks there is a noticeable difference in the LED tank.