mh to led?

Thats a pretty deep tank, not sure much will have good par at that depth, maybe a custom one. What are the other dimensions?

well, how powerful do you want the lights? What are you wanting to grow?

Tbh, I've never seen PAR data for a tank that tall. Message me, I know a guy who sells DIY PAR meters, and that might be extremely helpful for you.

I use one kessil a150w for a 57 rimless tank. They are pretty powerful at 32w for one led, and its comparable par to a 150w mh hence the name. Id say you would need atleast 3 to go the length but not sure even those would have great light on the substrate. Where in ga are you? I have one if u want to test and are near savannah

Led light with a good options. Key is getting the right optics on the led light. You can get an led that will spread the light out over a really wide area or you can get an led that will shoot the light down deep into a tank. Yes you will still need a high power setup but when you compare the cost of the 400 watt mh to the low wattage power usage of the leds you can spend a little more and start saving tons of money over a couple years which the leds will last without an issue.

Sent from the Monster Fish Keeping App

I don't think it will take a ton to grow what your looking for.



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http://www.buildmyled.com/iwagumi-7000k-xb-series/

This may be your best bet. They have very good technical support and can tell you if another fixture would be a better fit, best beam angle, as well as the par values.