Buildmyled Not Impressed - The Planted Tank Forum
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post #1 of 13 (permalink) Old 12-01-2015, 02:16 AM Thread Starter
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Buildmyled Not Impressed

I recently purchased a 24" XB 10,000k (I know but I prefer the color). It is on newly planted tank and already seeing good growth out of several stems and the Monte Carlo (the rest are melting) in only one week of being on the tank. My biggest disappointment is how bright the tank is. Even at 100% the tank is dark and dim. I added a 20" Planted+ and it appears twice as bright as the Buildmyled XB. I emailed them about the dimmer possibly being defective as it will not fire the lights until 30% but have not heard from them in a week. Gonna try to call them tomorrow.

Does anyone else have this same fixture and get similar results?
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post #2 of 13 (permalink) Old 12-01-2015, 02:48 AM
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Originally Posted by xjclassic View Post
I recently purchased a 24" XB 10,000k (I know but I prefer the color). It is on newly planted tank and already seeing good growth out of several stems and the Monte Carlo (the rest are melting) in only one week of being on the tank. My biggest disappointment is how bright the tank is. Even at 100% the tank is dark and dim. I added a 20" Planted+ and it appears twice as bright as the Buildmyled XB. I emailed them about the dimmer possibly being defective as it will not fire the lights until 30% but have not heard from them in a week. Gonna try to call them tomorrow.

Does anyone else have this same fixture and get similar results?
Take the dimmer off...
The drivers usually won't fire till 10%.and you can't dim to zero.
In other words it should never go off, unless by a timer..

If your light is out w/ the dimmer there is something wrong AFAICT..
though this is based on how it should work not how it actually works..

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post #3 of 13 (permalink) Old 12-01-2015, 02:54 AM
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10k is for growing corals, not plants. 6k-7k is for growing plants.

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post #4 of 13 (permalink) Old 12-01-2015, 04:20 AM
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Originally Posted by insane View Post
10k is for growing corals, not plants. 6k-7k is for growing plants.
BML 10k is not like a 10k..


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LED Selections per 12" Board: (10) 5700K Cool White, (3) 660nm Deep Red, (2) 450nm Royal Blue



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post #5 of 13 (permalink) Old 12-01-2015, 05:43 PM
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10000k may give you the impression that it is not bright to your human eye. Our eyes see 5500k as brighter even at same intensity.

For the plants it is a much different matter they do not use the light the same way.

This is something which must be taken into account.

Michel.
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post #6 of 13 (permalink) Old 12-01-2015, 10:17 PM
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Originally Posted by micheljq View Post
10000k may give you the impression that it is not bright to your human eye. Our eyes see 5500k as brighter even at same intensity.

For the plants it is a much different matter they do not use the light the same way.

This is something which must be taken into account.

Michel.
This is absolutely true. The XR15FW from ecotech looked pretty dim to me as well. But man...the plants underneath it are truly at a different level than finnex lights. Make no mistake, I love my finnex fixtures for the value and price vs performance, but the premium fixtures like ecotech and BML may have more surgical precision in light output than the second tier brands.


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post #7 of 13 (permalink) Old 12-02-2015, 01:19 AM Thread Starter
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I was leaning towards the spectrum being the culprit of the illumination issue. Unfortunately I am comparing this to 10k bulbs I use in saltwater. I didn't doubt the PAR value produced by the light as the growth of the plants is very good and I have not been running it at 100%. The light emitted is just noting like my 10K T5 bulbs or the 10K MH I have.

The dimmer is definitely defective. The lights will not power up until roughly 35% and with the dimmer unplugged it is nearly twice as bright as the 100% setting.
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post #8 of 13 (permalink) Old 12-02-2015, 01:37 AM
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Just curious, once it fires can you dim it down to 10%?

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post #9 of 13 (permalink) Old 12-02-2015, 02:02 AM
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Originally Posted by xjclassic View Post

The dimmer is definitely defective. The lights will not power up until roughly 35% and with the dimmer unplugged it is nearly twice as bright as the 100% setting.

Dimmer is a simple 10k pot I believe..

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post #10 of 13 (permalink) Old 12-02-2015, 02:50 AM
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I have a 10k and a dutch on my 40b the 10k should be bright. Mine is very bright and I have it at 55% both are xb

Bump: I can send a pic of just my 10k on 100% if ya need
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post #11 of 13 (permalink) Old 12-02-2015, 03:39 AM Thread Starter
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Just curious, once it fires can you dim it down to 10%?
No, it always shuts off around 35%. Once the lights black out i sometimes have to turn it to about 50% or better to get the lights to fire back up. The potentiometer inside is faulty. Considered going to the electrical supply house and just fixing it myself but the light is only 1 week old.

I built an LED fixture about 7 years ago and ended up controling it with a Reefkeeper and the ALC module. I am have temped to order the Reefkeeper cable and junk the dimmer.

Last edited by xjclassic; 12-02-2015 at 03:45 AM. Reason: spelling
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post #12 of 13 (permalink) Old 12-02-2015, 12:48 PM Thread Starter
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Cara from BML finally responded. They have two different potentiometer depending on the light and I may have been shipped the wrong one.
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post #13 of 13 (permalink) Old 12-02-2015, 03:10 PM
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lol that sucks

I was gonna say that thing should be ridiculously bright


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