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Lady Hobbs
04-06-2007, 10:41 PM
I don't know why I didn't think of this a week ago but today I added a light from my 55 to my planted 29 gallon. The bulb in the light I added is 19 watt. I never heard of a 19 watt! Anyway, this 29 gallon now has 34 watts of light instead of the 15 watt between the two fixtures.

Frankly, I don't know as I'd want to go anymore than 1.5 watt per gallon in this tank. I am really glad I didn't order that 65 watt now as I think it would have blinded these fish in this small tank.

But isn't 19 watt odd?

sergo
04-06-2007, 10:50 PM
yup. is the ballast rated at 19 watts?

Drumachine09
04-07-2007, 12:08 AM
The ballast is probobly rated for 19, but the actual bulb is probobly 15. sorry to bust your bubble.

cocoa_pleco
04-07-2007, 12:38 AM
15's are common. 19's are not. Drumachines right.

Chrona
04-07-2007, 01:28 AM
It's a 15 watt. The back of the strip in my old light said 19 watts too, but that's the ballast. Drum is right. There are no funky wattages unless you get into T-5 HO lights.


Fish do just fine under bright lights btw. Many people have over 5 watts per gallon on their tanks. And think about saltwater reef tanks with 10 watts per gallon of metal halide lighting ;)

Lady Hobbs
04-07-2007, 02:08 AM
Oh OK. I have 30 watts in total then.

Owen Stubbs
04-07-2007, 02:51 AM
Isn't there an issue with light that it is not just an additive matter, but something having to due with greatest intensity? IE, better to have a single 40 watt (wattage for example only) than two 20 watts?

Drumachine09
04-07-2007, 02:59 AM
Isn't there an issue with light that it is not just an additive matter, but something having to due with greatest intensity? IE, better to have a single 40 watt (wattage for example only) than two 20 watts?
yup........

Chrona
04-07-2007, 03:25 AM
Isn't there an issue with light that it is not just an additive matter, but something having to due with greatest intensity? IE, better to have a single 40 watt (wattage for example only) than two 20 watts?

Yep, which is why metal halide lights can do so much more per watt than any kind of fluorescents.