12 k Leds

[ILikeFish]

I have been trying to figure out what to look for in an Led for a while now. I found a link of some leds that have what looks to be a spectral distribution in the range that can be used in a reef.

I think these are quite low power so might not be practical but thought it would be worth posting because the color temp looks good.

I am sure commercially available products such as Wingo's LEDs are much better (Yes Wingo's LEDs Rock!). I would just like to quantitatively understand how they differ from these in Spectrum and Intensity.

1. Link: http://www.hebeiltd.com.cn/?p=led.auto.piranha

2. I was thinking "980MW7C" looks interesting.

3. Check out page 3 in the pdf. It looks like there are bins offered that are higher than 10k.

If anyone knows how to read these diagrams please chime in. Also I think the "MLM" is a way fo measuring the brightness. Does anyone know how this translates brightness we can understand?

 

[Aqua Pro Builder]

Your questions need a whole course to explain.

Let me first start off like this:
1)The 980MW7C is NOT 12,000K LED, they are the most 10,000K when you over drive it. That's you have to know how to drive it right to get close to that color temperature. Most vendors will not bother to drive it, nor know how to drive it, to that point for you due to manufacturing concerns. However, if you know how, this is a good project to fool around with.

2)HB is a pretty reputable company too as they will mark the junk LEDs as X grade seperate from their regular productsl. Note: they have a section of the X grade LEDs for toys which many on line vendors ebay them as regular.

2.These LEDs are 0.2W max, and are similar in the ones I used for my moonlights and the retiring flexible moonlights. Search my DIY threads, you can see how easy to make some of them work for you. Search my pico tank thread somewhat 3 years ago and you can see how some of them work in real life.

3)MLM (milli Lumens) is a measure of PRECEIVED power of light. Our eyes are more sensitive to certain color(wavelengths) of light such as green at ~490nm-560nm. So the same amount of energy used to make green light seems to us is much brighter than same amount of enrgy used to make blue light ~450-490. Therefore, the regular light meter, which calibrates to measure our preceived power of the light, has very little meaning to reefers unless the wavelength is also mentioned. For example a LED of 120LM green is basically useless for plants that photosynthesis while even 30LM of blue can raise a grass or two. Search one of my fresh water thread and the 17W LEDs I used on it keep the plant growing with only slightly less performance, in terms of growth, against the original 72W flourescent-a lot of the junk frequencies for plants are not generated by choosing the proper LEDs.

4)Without training ours eyes to the power of x lumens, I think use their MCD(milli Candle Light) will give you a better idea of the brightness. We are more likely to recognize the power of a candle light than a lumen I believe.