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Bulbs are about a year(time for replacement)How old are your metal halide bulbs?
How far away from the light is the rock structure?
Why would you recommend 14k or 20k bulbs?Yeah you need to replace those. Try to go with a 14k or 20k if possible.
What size tank?
How many MHs?
What brand?
How old are the lamps?
That should be enough light, though next time you switch out the lamps you could try some Radiums, I have had good success with them with S. haddonis, which are sandbed dwelling, and require a bit more light than an E. quadricolor.
Do you have any supplemental lights?
bulbs are less than 2 weeks oldSorry, meant the actually Hamilton bulbs.
I only have the lights on for 5hrs. Is that not long enough?
Jim

