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XM par 10K 20K 15K Huh?
I am in the process of setting up lighting for my new tank and I was looking at XM bulbs for my halides. The tank is 29" deep and I was going to go with 400W setups. Here where the question is why is the PPFD so low on the 15K XMs?
Personally I don't like how yellow the 10Ks are and I was worried the PAR on the 20K wouldn't be high enough. Well I was set to order 3x400 XM 15K went someone referred me to your site. http://www.reeflightinginfo.arvixe.com/index.htm By the way thank you for setting that up. Real numbers not conjecture. A rarety in this hobby. Anyway the PAR on the 15k XM is horrible. According to your numbers on a m59 40% lower than the 10K XMs 19% less than even the 20K XMs It seems to be generally excepted than as you go bluer the PAR goes down I was wondering what was so unusally to account for this bulb being out of the norm. |
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