full spectrum fluorescent tubes

[rancho2]

I just changed from full spectrum featherbrite bulbs to full spectrum fluorescent tubes. there are 2 24", 17 watt, CRI 93, 5500K tubes. they're about 12" above the cage but the light doesn't seem very bright at all. is that typical?

[Sally]

To me, some of these new bulbs don't seem as bright as the old ones. They say they are the same wattage, but I wonder about that. I do place my lights right on top of the cages, so the light is much closer than yours. The CRI 93 and 5500K should be really good.

[rancho2]

does the lack of brightness keep the birds from getting the 'full spectrum' they're supposed to get?

[Sally]

Even using the full-spectrum bulbs, I don't depend on them to be supplying the proper amount of UVA/UVB/D3, I supplement with a vitamin and/or calcium supplement that has D3. That way, I know they are getting what they need as far as D3. Some of the articles I've read say the light needs to be at least 12" close, so I think you are OK.

[rancho2]

thanks sally,

I do supplement with those things anyway. I was a little concerned because if it's too bright it's not good, if it's not bright enough they get depressed. trying to find a happy medium