DIY kits for LED aquarium lighting are now easier than ever with the infinitely customizable packages from Rapid LED. Whether you want all white, all blue, or your own selectable blend of both colors, Rapid LED has the kits for that. Whether you want 40, 60 or 80 degree lenses, Rapid LEDs carries all manner of optics that you can mix and match to produce your very own flat field or spotlighting effect. The DIY aquarium LED kits from Rapid LED are very affordable with the majority of the full kits running for about $10 per LED but it does come with some trade offs. Unlike a retro-fit kit which can be pulled out of a box and slapped into a hood, the Rapid LED kits require a lot of wire connections and at least some cursory knowledge of electronics. The other major omission from the Rapic LED kits is some form of a heat sink. The longevity of LED is directly related to how cool they are kept and if you plan on buying and using one of these affordable and flexible LED kits, be prepared to spend some time on eBay or HeatSinkUSA trying to find a slab of highly finned aluminum that will suck all of your LED’s heat away.