It arrived today. Excellently packed. And, holy s* is it bright! In my brilliance I decided to look right at it as I turned it on to test it. Blinded myself and saw stars for a good few seconds after I turned it off. My one real complaint so far is the cord is so short. (I've also learned that two would fit over a 20 gallon tank). I only have one, placed right over my Pings (swapped out my T5s). I'll see how they react. If well, I might upgrade a few lights to LEDs. It's notably brighter than my 4 bulb, 2 foot T5 set. Not sure how that will translate in terms of plant growth, yet.
Originally Posted by NatchGreyes
I have been using LED light fixtures (meant for freshwater aquarium use) on my CPs for a couple of months now, and I have been encouraged by the results. Take this mini "bog" on my desk for example. The larger D. adelae on the left had a distinct greenish tinge on all the leaves when I got it on 24 Dec. 2014. As you can see, the leaves, especially the largest one with its first meal for the year, had turned reddish-purple. And this was achieved after about one week under the lights.
The LEDs look like this:
If they had the same spectrum you could but I've rarely seen two spectrum charts that were the same even from the same company in the same spectrum range. Generally the R/B/G mess these up enough. Here is an example of one of the spectrum charts, you would need to find one that matched really close to use lumens as a basis.
Originally Posted by Randoja