Zoomed's 8,500K (I believe) FloraSun bulb.
Gives off a violet hue, much better than the so-called color enhancing 5,500K bulbs that give off an ugly pink/yellow color that makes the tankwater look like it's perpetually in dire need of a water change or carbon filtration. The violet isn't bad at all. You notice something's different about the tank, the looks different from warm-white, cool-white, or plant bulbs but it's mostly in the colors. It makes everything look great, the substrate, plants, even rocks and of course fish! *thumbsups