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They are interchangeable depending on the ballast used. As long as the ballast can handle the correct wattage it will work well! Feel free to let us know if you have any further questions!
The light when mounted higher will have a wider spread across the tank. This 1 foot of air will not hinder the light penetration too much however it does spread the light out further depending on the fixture itself. You of course can tell by seeing how the corals respond to the light or with the use of a PAR meter, but in many cases for deeper tanks (24"+) a larger wattage is required. Feel free to let us know if you have any further questions!
- Made in Japan
- 150W - Reef Tanks up to 18" deep
- 250W - Reef Tanks 22" to 30" deep
Happy By Harleybulldog on 2/6/2016Harleybulldog would recommend this product to a friendMy corals are happy and growing with the Phoenix 250W bulb. Nice color and I will buy another when the time comes. BRS shipping right on time.
Great Bulb By Robert on 12/21/2015Robert would recommend this product to a friendMaybe your like me & was a bit short of cash when bought your current light fixture (I bought the Chinese Odyssea MH + T5 fixture - I know). After enduring the cheap bulbs w/ fixture for 6months, I switched t these.
Wow , this is the MH bulb for your tank - just awesome difference. 3 minutes into the "burn in" & the "blue arc" was clearly a visible night / day difference on water, to corals, sand shimmer - I just was astonished @ the difference.
I then paired these MH bulbs w/ 2 ATI T5 true actinic, & 2 ATI T5 Pure Blue bulbs here & placed fixture 10" over a 120gallon, & am so glad I opted for this combination as results are incredible for the $$ spent,.
Though I really wanted a high end LED hood, I now have plenty of time for the LED if I choose, as right now I'm very content w/ outcome & now just waiting for a few months of running to see growth performance.
Great bulbs. By Jeff on 9/22/2014Jeff would recommend this product to a friendI run these on Galaxy Selectable Watt Ballasts on HQI setting and they are solid bulbs. Great viewing color, coral color and growth. They have a crisp look at a reasonable price. Can't be beat for the price in a 250w DE bulb.
Great product and price! By Walt on 5/13/2014Walt would recommend this product to a friendGreat bulb for the price, and looks good too. When you first cycle them they are SUPER blue! Don't let that be your first impression though, as they break-in they whiten up quite a bit and help your tank pop and clean up quite well. If you are not looking for the blue end of the spectrum go with a lower Kelvin rating bulb as they are more in the red/orange range. Good product overall and five star quality!
Great color without supplemental lighting. By Mikey on 1/28/2014Mikey would recommend this product to a friendLove the color this lights gives off without any supplemental lighting to the tank. I have only had it running for two weeks and so far love it. I also have noticed that it takes less power to run this bulb. I have a sunpod 250w fixture controlled by my apex and my total amp draw has gone down since changing to this bulb. Might be because the old bulb was way overdue to be changed. I got the fixture used and started the tank with the old bulb and replaced once the tank cycled.