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Mike Nielsen wrote:  "Overall it is a good buy and cheaper in the long
run if you factor in fewer bulbs to replace over the coming years.  VHOs
also punch deeper into the water and you will get better light at the
bottom of the tank."
Does a photon emitted from a VHO bulb behave differently than a photon
emitted from a regular fluorescent bulb?  Or are you just saying that
VHOs put out more light and that it has a pleasing appearance on the
bottom of the tank?
Regards, Steve Dixon -- in sunny (even warm) San Francisco