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6700k or 18000k
The facts
I know 6700K is more in line for fresh water planted tanks but is there going to be that much of a difference compared to 18000K based on the following 20" water depth Lps and softies I have run only the 18000k bulbs from the start but wondered what I will loose buy going to 6700K. Also any benefit in running a combination of the two or stick to one or the other. |
you will lose any hint of blue you may have ever liked! That will be super yellow...but bright as hell I imagine. This metal halide?
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Oops I guess I didn't give all the facts... It's T-5 Hagen lights which I'm stuck with. Unless I can find other 22" bulbs. The choices are 6700K, 18000K or actinic which seem way too blue.
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Well the colour comment still applies...not sure how PAR is affected with those bulbs.
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Any t5 HO 24W are ~22", Bayside would have them in a 14000K or close. Pair up a blue (actinic) and daylight (14000K) lamp. You may find you have an algae issue with any 6700K. Would be great for macros though.
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Mix the bulbs. One of each.
If you can only have one bulb, I'd go with the 18K. |
euphyllia and lps really like the blue spectrum from what I have read...
plus, an 18k bulb is much less likely to promote problematic algae growth. If it were me, I'd do a mix of them if possible and go from there. |
Quote:
I will have to give them a call, from what i've read 14000K seems to be the bulb of choice vs. the 18000K. I know the benefits of actinic but when I tried one with a 18000K the tank seems too dark. |
If it was my tank I'd go with 2x 14000K.
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