I got the fluval led full spectrum 5200k, its warmer look to it and also have beamswork 6500k, both on same tank, will see if plants grow ok. My first planted tank.. Just two weeks into it.
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Now a days there seem to be a lot of LED lighting choices on the market from cheap to expensive, with usually cheaper ones just just working with basic on or off functions, while the expensive units may have light control settings to replicate sunrise to sunset...
As mentioned though, its all about finding the right type of lights for your setup, since some are rated to have high light levels, while some are only really good for low - medium light planted tanks... also the spread of light is also something you should consider as well...
One down fall I have found with LED lights is that they are very bright. The ones that are specifically for plant growth are very bright compare to normal T5 or T5HO. Other than that, they are great and create very little heat.
Actually, probably one of the only real downers i can think about LED's setups is that if any of the LED's burn out, they can't be replaced, and if enough of them burn out, or weaken enough over time, you have to replace your whole unit...