Led replacements for fluorescent bulbs. I wouldn't recommend these. Too expensive and only "save energy" because they have less than half of the Lumen output of fluorescents (and you need as much Lumen as you can get for plant growth). In essence it would be replacing a 36watt fluorescent with an 18 watt, to "save energy" but you also half the output. Anything without a Lumen, CRI and color temperature specification is useless, they leave that out on purpose because they can't compete yet with fluorescent tubes.
If you already have fluorescent fixtures, just get fluorescent tubes. The cheapest option is Phillips 865 or Osram 860. Those are 6500K and have about the highest output in Lumen possible for a fluorescent of that size. CRI is only around 85 though, but they are only like $3 a piece.
The best fluorescent tube I have ever seen is the Osram Skywhite 880. It is 8000K with a CRI of 90+ but only has slightly less Lumens. They are slightly more expensive, around $5-$6 per tube.
For more reds and blues you can get the Sylvania Aquastar. It is 10,000 K and are around $15.
Other aquarium specialty bulbs can be as good, but are mostly 10 to 20 times the price, and never come close to the Lumen output of the 860/865/880. (More customization=less output)
Incidentally they do have excellent led strips with the right specifications, but those are never marketed for aquariums just for general use.
Remember you can also grow plants like we did in the old days, with incandescent bulbs or the cheapest fluorescent bulbs from the hardware store. It just won't look good, the fish will look like they're swimming in apple juice. The plants don't mind though...
