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Re: HO lights (was:Hornwort & anacharis don't grow)
> My tank is a thirty gallon "regular" with two 30" 40 watt HO daylight bulbs.
> BTW, I don't see much discussion of "HO" bulbs when lighting is discussed;
> it seems as though folks either use standard flourescents, or SHO or VHO,
> but not HO. The thirty inch size is perfect for thirty (or maybe 29)
> tanks, and a pair of 40 watters is about right, too, at least if CO2 isn't
> added. Any thoughts?
I haven't seen thirty inch lights at all in any wattage or color index in many
years. I had made an assumption that they were no longer being made. I'd
like to have some for my 20-long. As for HO's, they put out 60% more lumens
than a standard wattage bulb, but there are also standard wattage bulbs, like
Interpet Tritons and Philips Ultralumes, that also put out 45-60% more lumens
(maybe even more than that) without using extra wattage. So that makes HOs
kind of unpopular.