Optimal spectrum, high efficiency, quality components, and sturdy construction make ABI bulbs the smart choice for your color lighting needs. The 450-460nm blue light is perfect for aquariums, promoting vegetative plant growth, laboratory use and more. 15 high power LED chips use a true 24W of power. An integrated ball-bearing cooling fan quietly keeps the temperature down allowing the power to be cranked up to a level that would not otherwise be possible with a bulb this size.