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Old 08-09-2011, 06:27 PM
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Default will this grow plants?

hello today i was looking through my light bulbs and i found a 26watt 120vac 60hz 390ma bulb?
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Old 08-10-2011, 11:55 PM
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Default Re: will this grow plants?

anyone know?
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Old 08-10-2011, 11:59 PM
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Default Re: will this grow plants?

what's the K rating? techniquely, all bulbs will grow plants, it's just what does better and looks better...
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Old 08-11-2011, 12:04 AM
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Default Re: will this grow plants?

Yes, it will grow plants. But yeah, really? what plants? 26w is a bit low for a lot of tropical plants like bromeliads but if you want to grow pothos or star ivy that'd be fine.
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Old 08-11-2011, 01:06 AM
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Default Re: will this grow plants?

i have bromialads under the light right now
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Old 08-11-2011, 01:37 AM
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Default Re: will this grow plants?

what's the K rating???

Bromeliads will grow, they just probably won't fully colour up, depending on the K rating...
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Old 08-11-2011, 04:13 AM
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Default Re: will this grow plants?

bromeliad color isn't really determined by kelvin rating. It is more light intensity that determines that, and there are literally tons of different situations that can determine if you have enough light or way too much/not enough. First off, what type of bulb is this? i'm assuming fluorescent, but i could be wrong. If it is incandescent, its better off in the garbage. Light intensity can be measured in a couple different ways, most common being lumens. This can be a problem because lumens in based on how bright the human eye perceives it (mainly light in the green spectrum) and plants do not use green light. That is why they look green to us. The light simply bounces off them and is not absorbed. In general though, the lumen rating can tell us how useful the bulb will be to growing plants. A 26 watt spiral cfl usually puts out about ~1200 lumens depending on the brand. That would be enough for a small tank (maybe a ten gallon or so) The height of the bulb over the tank also plays a big role. Even a 150 watt metal halide could be not enough light for plants a ten gallon of not properly placed.

So we really cannot answer your question without more information. What type of bulb is it? what type of fixture? Does it have a reflector? What size tank are you lighting? What light level do you want to achieve (low light and slow growth, or high light with fast growth and vibrant colors). As you can see, vivarium lighting can be a hassle to get right haha
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Old 08-12-2011, 01:32 AM
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Default Re: will this grow plants?

cfl, zoomed terrarium hood 60 watt, reflector behind the light, 12x12x18 zoomed tank, high fast...
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Old 08-12-2011, 05:18 PM
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Default Re: will this grow plants?

alright, that will grow most plants decently well, but you could always do more light if you want your broms to color up more. I think you'd be alright with what you have.
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Old 08-12-2011, 07:14 PM
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Default Re: will this grow plants?

ok thank you
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