night be a total noob question .. about leds ..

tinman

tinman

Well-known member
so this might sound like a total noob question and may be it is ..


when we talk about leds of different colors like RB, NW, WW , NB .. i heard people saying dailingthe intensity of each color using the dimmable drivers to get the desired colors .... i have seen DIY posts with colors suiting the users eyes ..

so isnt it that corals need different spectrum (atleast 10000K and actinics which i guess is royal blue leds )

can we acheive wonderful coral growth with just say a 14K 100W led ?


how does it work ??
 
prestige-led said:
It certainly is possible to achieve great growth if said 14K 100w led light has a full spectrum.
Click to expand...

confused me again .. 14K 100watt is good enough all by itself ?? just one single color ? no actinics ?

aand what is meant by full spectrum again ?? isnt kelvin rating is what decides spectrum ?
 
The link posting is fine, but I wouldn't trust anything from Hong Kong when it comes to my fish tank... The licensing and quality control are lacking to say the least.
 
I think Gus accurately pointed out the "gotcha" in this particular light when he said "if the 14K 100w led light has a full spectrum". There is no way you could accurately determine whether this particular led would sustain coral in an aquarium without an analysis of the spectral output.

Also, I have seen these leds used before, and the only application I have seen them used in is floodlighting. Typically, for billboards or tennis and basketball courts. Never seen an spectral analysis of them, which would lead me to believe that they are not very well suited for growth or sustainability in the reef world yet, only as a means of simply lighting things up, which usually equates to algae growth, if anything, in the aquarium world.

My two cents.
 
The only lights with real spectrum analysis that i know of are canon and kessil and orphek. I would be afraid to try anything outside these brands for the lack of information/data and no aquarium testing.



*EDIT* To answer your question about using actinics and such,when you say a color spectrum(14K for example) Wether it's LED or Metal halide,this Kelvin rating should have every color that is needed for our corals,reds,blues,whites etc,etc. Many of the chinese leds say certain ''K'' rating,but in reality it is not,so be very careful to this mis-leading bit of information,with the vast majority of reputable companies you do get the advertised ''K'' rating,but beware of the companies overseas.
 
Ummm so isn't there a way that we can use a single bridge lux 50 watt led to achieve the growth of all the corals ?? If I'm talking a biocube sized tank ??
 
Have your lights had a spectrum analysis just wondering if not how do you know they are on the same level as named brand ones to grow coral?
 
prestige-led said:
The answer is that we only use known name-brands.
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So are u saying buy kessel over your lights? Or are we just talking about the actual led bulb that vessel uses and if so do u you the same bulbs that kessel uses? Im only asking so I know the thanks in advance
 
woah... forget EVERYTHING you thought you knew about LEDs and let's start from scratch.

what exactly are you trying to do?
 
I Have used 2 20 watts LEDs on my 10 gal experiment tank for about 2 years with great results.
Colors were there as well as growth. It was lacking spread but for my needs I worked.
Just my 2 cents.
 
szywica said:
woah... forget EVERYTHING you thought you knew about LEDs and let's start from scratch.

what exactly are you trying to do?
Click to expand...

We do not know much about LEDs, especially for reef use. For example, LED manufacturers typically state that LEDs will last about 50,000 hours or so based on its MTBF rating. But this is wrong. "The time shown should be described as “LED lumen depreciation to L70,” not as “Lifetime,” and should avoid any implication that it represents tested product lifetime". This is according our Department of Energy. This is especially true when you consider that the effect of color shift in LEDs isn't even considered when calculating MTBF. In fact, it isn't tested at all beyond 6000 hours. And there is no way to extrapolate the results from 6000 hours of testing to something longer. I guess time will tell.
 
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