KeIgO86

Aquarium lighting comes in different "colours" as most of us know. Some prefer the whiter colours as it looks prettier in our tanks. Others like the daylight colours.

Which light spectrum do you use? And what are the differences (if any) you see in the health of the flora and fauna when using lamps of different light spectrums?

My personal experience is that fish seems less comfortable with the whiter colours. They're always hiding under 8000K lights.

banderbe

I am betting almost everyone is going to pick a mix of spectrums.

Gomer

the hard part is, is that kevin ratings isn't the whole story in color.

You'd think that a GE 9325K bulb would be sorta bluish almost like a 10000K bulb, but theya re really pinkish.

KeIgO86

I'm interested in the reasons of you thinking so. Mind sharing the reasons why?

That is something new to me. Maybe they can go under the "Others" section as I doubt they are anywhere near being as popular is the 6500K and 8000K bulbs. Or am I wrong?

AaronT

For viewing purposes I prefer a mix of 6,500k and 10,000k. It's about as close to true 8,000 k as you can get in the States aside form the ADA bulbs now available. Fish and plants seem to do very well under those kelvins. Honestly though I think it has more to do with the quality of bulb you are using.

John N.

I enjoy the GE 9325k from lightbulbsdirect.com mixed with 6700k. Works best for my eyes, not to pink not to white. Plus the plants and fish glow.

-John N.

Jimbo205

I had the Zoo Med Flora Sun bulb which had a horrible purple color to it that looked terrible in my office cubicle! I finally exchanged it for the Zoo Med Ultra Sun Bulb - Super Daylight 6500K. Now my 2 Gallon Nano - Betta Bowl looks great! And with the Daily Dosage Schedule, now looks the way I have always wanted it to look. And with the new light - I actually can show it off! (The other color made everyone that walked by my cubicle want to puke. I would only use THAT light when I WENT HOME for the day!)
Thank goodness, it looks good now!

heyman

I use a jalli 7100K bulb, nice white light .

gnatster

I am surprised no one has pointed this out. You are taking a poll on color or kelvin, not on the spectrum of the bulb. It is quite possible to have 2 bulbs exihibit the same color or kelvin and show differing spectrums.

Spectrum can be defined as the distribution of variance or power across wavelength or frequency.

Whereas Kelvin can be defined as the color temperature of light source.

In essence the poll is about what Kelvin people prefer, not which spectrum.

I for one, would like to see someone that has the knowledge and just as importantly, the equipment, step up and plot the spectrum of the bulbs commonly used. Much like Dr Sanjay Yoshi has accomplished in the reef community.

Newt

I like a mix: Philips PL-L 950 PC, 5000K, 91 CRI; a Sylvania grolux and a C75.

Spectrum refers to the visible light spectrum that a bulb emits and is measured in nanometers from 400 nm to 700 nm. I think you are refering to kelvin temp (color temp of a bulb). Two very different things.