How crappy are these light really?

[lilbitreefer]

So I have two geisman VERVvE lights on my 120g tank. I feel as though I am not getting good looking guys. My par at 12-16” is 110. My corals don’t seems to be growing more ch and my scan has turned brown. Does anyone have any thoughts on this? Does anyone have any good light parameters to program it for? I seem to be growing more algae than anything. Anybody got any thoughts?

 

[mtraylor]

That looks like a real nice light to me. What is the dimensions of your 120? What are the settings on the light. That includes each spectrum and intensity?

 

[mtraylor]

how high is light off the water?

 

[saltyfilmfolks]

If the par is 110 at 12in. There’s a prob with the settings or it’s underpowered for the tank.

 

[lilbitreefer]

Answers,
Tank dimension 4x2x2
Light it 6-8” off water
Picture of my settings, I turned it to acclimate because of all the algae battle at place right now. If you look at the colored lines those are the different light Chanel’s corresponding to the intensity. Oh and the app sucks trying to program it and the buttons on the side of the light are even worse.

 

[saltyfilmfolks]

Answers,
Tank dimension 4x2x2
Light it 6-8” off water
Picture of my settings, I turned it to acclimate because of all the algae battle at place right now. If you look at the colored lines those are the different light Chanel’s corresponding to the intensity. Oh and the app sucks trying to program it and the buttons on the side of the light are even worse.

Odd. I just looked at the specs, 6in at full should be in the 1000’s.

What meter are you using?

 

[lilbitreefer]

Let me try it real quick and adjust the settings

 

[saltyfilmfolks]

A quick note , I think those are supposed to be higher. So there’s probaly a severe hot spot in there.

http://www.coralvue.com/giesemann-vervve-led-fixture

 

[lilbitreefer]

so light set at 5" above water at 12" deep I got a par of 279 3" below pae 579.

 

[lilbitreefer]

I am also using the apex par monitor that has been in the tamk for about a year now. I did clean the lens before doing this as to prevent algae from being a problem.

 

[mtraylor]

First Off. Let me Chime in here at the beginning and say that I do not own this light nor have I ever used it, but I have been running LED Mitras fixtures for over 6 years with success.
This is where I would start you lights.

First, turn off the acclimation crap off and set the lights to full power. Set the lights as follows:

•Cool White: 12 Cree LEDs XB-D (36w) 16%
•Deep Blue: 8 CREE XP-E 480 nm (24w) 100%
•Blue: 8 Cree XP-E 465 nm (24w) 100%
•Royal: 16 (4 Quad-LED) Cree LEDs XB-D 455nm (48w) 100%
•Blue SB: 4 Cree LED's XB-D 440nm (12w) 100%
•Deep Red: 4 XP-E 625nm (12w) 6%
•Warm White: 2 Cree XP-E (10w) 12%
•UV: 2 Semi LEDs 390-400 nm (5w) 100%

If you are having algae problems, there would have been 2 problems IMO.

A - You were putting too much red and light into the aquarium. Not sure from your pics.
B - You have a water quality problem.

I would think that its a water quality problem. You can post your parms later as we are trying to get your lights under control. Make the following settings and lets check out your PAR after you
make the changes. Also let us know how it looks once you made the change. I think this will be a great starting point for you.

 

[saltyfilmfolks]

First Off. Let me Chime in here at the beginning and say that I do not own this light nor have I ever used it, but I have been running LED Mitras fixtures for over 6 years with success.
This is where I would start you lights.

First, turn off the acclimation crap off and set the lights to full power. Set the lights as follows:

•Cool White: 12 Cree LEDs XB-D (36w) 16%
•Deep Blue: 8 CREE XP-E 480 nm (24w) 100%
•Blue: 8 Cree XP-E 465 nm (24w) 100%
•Royal: 16 (4 Quad-LED) Cree LEDs XB-D 455nm (48w) 100%
•Blue SB: 4 Cree LED's XB-D 440nm (12w) 100%
•Deep Red: 4 XP-E 625nm (12w) 6%
•Warm White: 2 Cree XP-E (10w) 12%
•UV: 2 Semi LEDs 390-400 nm (5w) 100%

If you are having algae problems, there would have been 2 problems IMO.

A - You were putting too much red and light into the aquarium. Not sure from your pics.
B - You have a water quality problem.

I would think that its a water quality problem. You can post your parms later as we are trying to get your lights under control. Make the following settings and lets check out your PAR after you
make the changes. Also let us know how it looks once you made the change. I think this will be a great starting point for you.

Agreed.

My simpler method is. Set the peak colors to how you like to see them and it makes the tank look good.
Then set the par.(intensity)

 

[mtraylor]

Another source on the forum that can help you that has the light.
https://www.reef2reef.com/threads/giesemann-vervve.281456/

 

[Dana Riddle]

I agree with mtraylor and saltyfilmfolks, and would like to make another comment about a PAR sensor that is subjected to light and immersion for a year. The sensor's acrylic lens will 'fog' and the light sensor itself doesn't last forever (I had to have my LiCor sensor rebuilt after taking quite a few measurements, but I doubt it added up to 4,000 hours of exposure.) I'm not that familiar with the Apex sensor - is it corrected for the immersion effect? Tangent questions, but could be important for future considerations.