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I'm not sure what you mean by color range, but I have the 65W 10000K CoraLife bulb in an Aqualight and it's a slightly bluish white light. I use it in combination with a 6700K CoraLife bulb in a second Aqualight. But when the 6700K bulb burns out I'm gong to replace it with another 10000K bulb.
 

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Check to see if any of your local stores have the bulb as Coralife usually has the output spectrum graph on the sides of their boxes.

I can also pull the info from my Coralife 28w 10k pc I have at home, should be the same output spectrum as the 55w.
 

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Hard to say as I don't have a lot of reds in that tank. That and the 6700K bulb has a very yellow/green cast to it. On my 40gal tank I have 8800K bulbs that I really like. Those have a slightly pinker cast than the 10000K and do a great job at bringing out the reds in both my plants and my Cardinals. But I can't find them in a [....] configuration so they're not an option for my 29g unless I can convert the endcaps in my Aqualight to [::].
 
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