I think the lesser 5.0 should be fine on birds. I would imagine as well that it would be safe for up to a year since it is not as vital in calcium absorption in birds. As far as length it would just depend on your setup. Where we have cages more separate we use the 12" bulbs and fixtures, where we have rows of cages we use the 4' bulbs and fixtures so it will just depend on your cage and where you have it situated.

I'm never sure on when people say box if they actually mean it or not, we have had some that will come on here and say how they put their bird in a shoebox (doesn't it chew out) or a plastic tote for night time so I have to make sure LOL!!

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