[jimeluiz]

What about bulb/tube life? I have VHOs. I'm guessing that they will slowly fade... but then I will have a hard time noticing the difference while our critters slowly suffer. What is the 'standard' switch-out period? One year? Shorter, longer? Are there subtle, predictable changes in appearance that will alert me to the need to change out tubes?

Also, regarding reflectors. The tubes have internal reflectors built in to the top of the tube. My guess is they help lots, but adding a shiny aluminum reflector on the inside top of my hood would boost matters further. Any guesstimates on the percent increase? Sorry to go fishing for fractions of advantages, but perhaps I would be surprised by the increase. It may get me off my duff and to Home Depot. I do notice that the edges of our tank are considerably 'darker' than the center. A reflector would help.

Thanks in advance.