Comments: Bulb made an immediate difference over the off brand 14000k bulb I had been using. Corals which were browned out are now vibrant blues and greens. Tank looks awesome. It is expensive, but it's the best improvement for the money I've made to my tank. Highly recommend!

Comments: I am extremely happy with this bulb. It has made huge difference in my tank with coral and acutely algae growth it has slowed algae down to where I can clean walls every few days and its still clear blue water...love the light would highly recommend

Comments: I love the color of these bulbs. They will give you nine months of great coloration and growth from your corals. However, my first pair shifted spectrum at nine months and needed to be replaced. 9-12 months is the expected life span of HQI bulbs. Despite the shorter life span I believe these bulbs are worth the extra money.

Comments: bulbs did not fit my fixtures, and kept slipping out.

Comments: I love these bulbs! My corals "pop" more than ever, they really bring out the colors. If your in the market for a good 20K light, this is it!

Comments: As the title says . . THIS BULB ROCKS. I was originally hesitant to drop an extra $40 on this bulb but in actuallity that is the cheapest investment you can make to get your tank to shine like that. Over the past five years, I have tried both PFO and Metal Halide lighting with various bulbs and arrangements. None of which compare to the quality of light provided by this 250 W 20000K Metal Halide Bulb. The light is by far the most crisp and clear I have ever seen. My tank has really impressed made me smile in the past but I couldn't help but grin from ear to ear when I put this bulb in. (BTW it takes a few days for the bulb to get broken in and really shine)

Comments: I would highly recommend these light, they are great. If you want your coral colors to pop Buy these lights. I had 10K's and they were fine but I wanted more blue, so I ordered the 20k megachrome and I was so pleased. Plus my coral love them. One thing I have to say also, I have ordered from Marine Depot several times and they always have good prices and if you need help just call they are always helpful and have some one who can answer any question you may have about a product. Hope this helps someone who may be wondering about the 20k's. Thanks Tonya Beam

Comments: I have a nano 29 gallon sps tank with no hood and I use an OmegaStar hood and ballast. I've tried several 20K bulbs and I've always been disappointed with the blue spectrum of color. I have no supplimental lighting because I don't need the extra light. I was considering putting some actinic bulbs above the tanks when a friend recommend this bulb.
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<br />This bulb is fabulous. I have great "actinic effect" from this MH bulb. Plus, I've seen my corals respond very well. I've bought a 150 version to go over my lps nano with the same great result. An added bonus is these bulbs are low in infrared compared to others I've tried.
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<br />These bulbs are a bit more expensive but I'm never switching.

Comments: The color is very blue. Best bulb that I have use so far. My acro gets very good color.

Comments: A quality bulb that produces a very nice crisp clean white light with the perfect hints of blue. With a stable burn time of 6000 hours you cant go wrong, thats almost 2 years depending on your photoperiod. I have been running mine for about 4 months and i love it.