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Old 09-24-2013, 06:38 PM   #1 
CoolishPrune3
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5000k Bulb

I picked up the only bulb I cound find, for a plant, which was 5000k. Is that going to be bright enough??
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Old 09-24-2013, 08:21 PM   #2 
lilnaugrim
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Yup! I use that on my 10 gallons and under tanks
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Old 09-25-2013, 06:02 AM   #3 
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Think of 5000k as being a bright overcast day, and 6700 as a bright blue sky day.

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Old 09-25-2013, 08:05 AM   #4 
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Not a question of brightness; wattage determines that. The K in 5000K is Kelvins. That's a rating of color "temperature," the look or quality of the light. As Ricky says, 500K is the color of a slightly cloudy day, 3000K looks like late afternoon. 2400K looks warm like a bright candle. !0000K is very blue for saltwater; it's supposed to mimic mid-day over the reef.
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Old 09-25-2013, 07:21 PM   #5 
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Oh. Does that mean I bought the wrong bulb and was supposed to get a bulb that has a lot of Watts not Kelvins??
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Old 09-25-2013, 07:23 PM   #6 
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No, no, no! You bought the right bulb for the right thing! Wattage is just how much electricity the bulb uses which tells you nothing about growing your plants. It won't be as strong as a 6,500K bulb but depending on the tank size you can easily get medium light and sometimes high light if it's a shallow enough tank, it does a great job on my 3 gallon
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Old 09-25-2013, 07:28 PM   #7 
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Okay good, whew. I bought the brightest one I could find. On the box it says 'Natural Daylight'
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Old 09-25-2013, 07:29 PM   #8 
rickey
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They figure 6700K is about the best color spectrum for plant growth does mean 5000K won't grow plants they will but not as well.

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Old 09-26-2013, 08:47 AM   #9 
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Another light-thing to know besides wattage (brightness) and Kelvin (color), is duration. Your 5000K will grow plants just fine with an extra hour per day duration. Over time, you'll adjust the duration to suit the plants.

I like the looks of a 5000K better than 6500K. I'll probably get that color temp next time.
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Old 09-26-2013, 10:59 AM   #10 
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Coolish I have had very good luck with my plants and my 5,000K bulbs. Different plants need different amounts of kelvin, look for lower light plants like Wisteria or Hygrophila Corymbosa. They're plants that if you break them, you can just plant the two pieces and they will still grow. Its beautiful. I have a ten gallon bursting with these plants now. And the fish seem to love it, they hide in it, the betta's in the 20 would sit on the leaves and sleep.
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