Par 38 LED spotlights

[rick88]

why is there no straight answer on sps are we avoiding the word "NO" or waiting for someone to prove the lights capabilities. (im refering to most all sps not just monti's and birdsnest's)

 

[williah]

I'm curious, has anyone who purchased this light run PAR readings at varying depths, say 6", 12", 24", 36"?

 

[CalmSeasQuest]

I'm curious, has anyone who purchased this light run PAR readings at varying depths, say 6", 12", 24", 36"?

Evil posted PAR charts on another forum, I'm not sure if RC allows me to post a link. Using the 80 degree optics, at 14" PAR was 150-200

Perhaps Evil will post all the PAR data here?

I'm keeping lots of SPS under mine - but it's only been up for a couple weeks AND the lamp is only 9" above the frags providing a very small coverage area (about 10" diameter) It's too soon to make a definitive determination but so far so good.

If it works 1/2 as good as the AI LEDS (used on the DT in the pic below) I'll be very happy.

 

[chasekwe]

Could you give the exact dimensions of the light? How long is the fixture, what is the diameter at the largest point?

 

[CalmSeasQuest]

Could you give the exact dimensions of the light? How long is the fixture, what is the diameter at the largest point?

About 5" deep and 5" max diameter - Much like an outdoor flood light.

 

[mirkus]

To estimate the spread of 80 degree lens just google a triangle calculator and input your distance and angle. With that said, I have two 80 degrees on my tank and it covers 30 x22 inches okay. The lights are 10 to 11 inches off the water.

 

[beeker]

post pics of your PAR38 setups please :] i need to see some more convincing images, lol

 

[Cozen89]

you can see some shots of my par38 bulb over my 20 gallon long here. http://reefcentral.com/forums/showthread.php?t=1777124

It is 20K with an 80degree spread. The light fall off on the sides of the tank aren't as bad as the pic shows. It does drop off a bit, but that's perfect for me as I plan on keeping yumas in the shaded sides.

 

[homeboyreefer]

why is there no straight answer on sps are we avoiding the word "NO" or waiting for someone to prove the lights capabilities. (im refering to most all sps not just monti's and birdsnest's)

plus one i really want to light a frag tank with these but just so little official info, i guess it is made by a small company so they don't have the resources to do any tests or want to. we'll have to wait until maybe grimreefer do some par and spread tests ?

 

[fewskillz]

I ordered one this morning. If I don't like it it's going over my 3 gallon Pico or getting sold.

If I like it, I'm ordering 5 more and lighting my 180! I'll probably have to get a t5 strip light or something for coverage, but I'm going to try the spotlights by themselves first.

 

[wayne in norway]

Do you have a LUX : PAR conversion factor? Always curious.....

Do you have any data on the amount of depreciation of light output with time. I believe the CREE's you use fare a lot better than other LED's?

 

[Cozen89]

Your tank looks good Evil. Thanks for posting those par charts. I'm not too familiar with the par required for different types of coral. What amount of PAR would you say is sufficient for LPS, and also for softies such as ricordeas?

 

[Psionicdragon]

ok, i think i am dumb...i can read a tax return, but can't read and understand the charts....

so how much par do i get on a 30-40 inch distance ?

how many of these units do i need to run for a 60x18x24 mix reef tank?

 

[Haksar]

How high is the light from the tank.Any idea what wattage are you getting with this light.
Is it equal to 250W or 400W MH.

 

[Haksar]

Thanks Evil,so your lights are at least 30-40 inch above water level or more I presume
I just bought a 2 x 279 W ( 240 W - 80 x 3 W 14k white and 39 W 460 nm blue) for my 150x50x50cms DT with mainly SPS reef.I have set it at 15 inches above water level.Do you think I shoudl raise it further up considering your set up.Its been one week since I got this lights.So far all my corals are happy and no bleaching yet.I don't have a PAR meter so no idea how much PAR my tank is getting.

 

[karsco]

Evil, just a quick question. I am looking at this light to light an area of my sump for a frag grow (mainly SPS & Acans) out area. I only need to light about a 10" x 12" area, the water depth is about 10", and I can mount the light probably about a 12"-18" above the water line. Would this light work well in this application?

 

[Stripe01]

Here's an updated shot of my 5g ADA, I just have two sps at the moment which are both birdsnest and they are growing good.

 

[Cozen89]

Depends on the corals, but most softies can tollerate around 100 PAR. Some are a little more picky than other, but with the falloff in PAR as you move away from directly underneath the lamp, there is always a spot that will work for them. Lps are the same way, but most can tollerate higher PAR when acclimated. I have frogspawn in about a 200 PAR area of the tank, and it does fine.

Thanks for your response. By tollerate 100 par, I'm guessing you mean they like less. I'm going to concentrate on yumas and ricordeas. Maybe some zoas. I have an 80degree lamp about 20 inches off the sand bed. So according to your chart I'm looking at around 100par on the sand bed and 200 par on top of my rock-200 directly under the lamp, and around 30-80 par off to the sides. So I think I'm good right?

 

[skippyreef]

WOuld these spots work to light specific areas of a 24" tank lit primarily with MH????

 

[Aquabacs]

A few pics of mine

Mike