LED light no longer as bright
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > Lighting


Reply
 
Thread Tools Display Modes
Old 09-17-2013, 03:49 PM   #1
Aquatic Delight
H is for Hillstream
 
Aquatic Delight's Avatar
 
PTrader: (9/100%)
Join Date: Mar 2012
Location: Space Coast, Florida
Posts: 2,074
Default

LED light no longer as bright


so i had a Marineland Double bright running on my 29g that i broke down and moved to my 40b(that i got a current fixture). so i figured i instead of selling my old marineland fixture i would put it on my 20l, and get rid of the T5 i had on it.

so i mounted the marinelandon the tank (5in above the tank) and the tank just isn't anywhere near as bright as the 29 was. and it doesn't seem to matter how high or low the light is it just looks dull.

any thoughts?
__________________
Will
________________________________

Hillstream/Boreno Loach Refuge

A Light Heart is Better than a Heavy Wallet.
Aquatic Delight is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 09-17-2013, 04:04 PM   #2
gus6464
Wannabe Guru
 
PTrader: (7/100%)
Join Date: Dec 2011
Location: San Diego, CA
Posts: 1,268
Default

Clean the splash guard?
gus6464 is offline   Reply With Quote
Old 09-17-2013, 04:30 PM   #3
jeffkrol
Wannabe Guru
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: WI
Posts: 1,735
Default

Quote:
Originally Posted by Aquatic Delight View Post
so i had a Marineland Double bright running on my 29g that i broke down and moved to my 40b(that i got a current fixture). so i figured i instead of selling my old marineland fixture i would put it on my 20l, and get rid of the T5 i had on it.

so i mounted the marinelandon the tank (5in above the tank) and the tank just isn't anywhere near as bright as the 29 was. and it doesn't seem to matter how high or low the light is it just looks dull.

any thoughts?
Probably an illusion.. When I first got back into fish I had a Marineland "puck" that I thought was fairly bright at the time.. When I bought my 40 and designed my own light, I moved the 20gal to a different location and put the same puck above it.. looks dull and really weak.. The light didn't change. My perception did..
jeffkrol is offline   Reply With Quote
Old 09-17-2013, 11:39 PM   #4
DaveK
Planted Tank Enthusiast
 
PTrader: (0/0%)
Join Date: Jul 2010
Location: Outside Philadelphia, PA
Posts: 934
Default

Consider that a 29 gal tank has a bottom surface area of 360 sq/in and a 40b has a bottom surface area of 648 sq/in, you can see that you have the same light trying to light up almost twice the surface area. I would expect the 40 gal to look dim compared to the 29 gal.

Depending upon what you want to keep in the tank, consider upgrading the lighting. You could either add an additional fixture, or replace the whole thing.
DaveK is offline   Reply With Quote
Old 09-18-2013, 05:27 AM   #5
Aquatic Delight
H is for Hillstream
 
Aquatic Delight's Avatar
 
PTrader: (9/100%)
Join Date: Mar 2012
Location: Space Coast, Florida
Posts: 2,074
Default

i should have specified that the light is now on a 20l and not the 40b. which is why i am so confused. shouldn't it appear brighter on a 20l?
__________________
Will
________________________________

Hillstream/Boreno Loach Refuge

A Light Heart is Better than a Heavy Wallet.
Aquatic Delight is offline   Reply With Quote
Old 09-18-2013, 06:22 AM   #6
Legot
Planted Member
 
Legot's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: Gilbert, Arizona
Posts: 251
Default

It would depend on the substrate and the background, is either darker in the 20L?

Is there any possibility that the driver could be damaged? Are any of the LEDs brighter than others? If it's still under warranty (IDK if they do that in this industry) send it in to get replaced and forget about the issue. If not then I'm sure we can figure it out.

About how long has it been running (like a rough estimate of the hours)? How many LEDs are there on the board and what wattage is the fixture?
__________________
People are too often merely stating an assumed truth from flawed observation.
Legot is offline   Reply With Quote
Old 09-18-2013, 03:22 PM   #7
Aquatic Delight
H is for Hillstream
 
Aquatic Delight's Avatar
 
PTrader: (9/100%)
Join Date: Mar 2012
Location: Space Coast, Florida
Posts: 2,074
Default

its a marineland double bright. i'ts had at the very most 5,00hrs on it. all the leds have the brightness look to them.

it now has a black back ground, and eco complete on the new set-up as opposed to white sand on the old set up.

new tank


old tank



the photo doesn't really show it well, it looks a lot brighter in the picture than it does in person. idk maybe i'm just expecting to much of this light. i just figured that on a shallower tank the light would like brighter than on a taller tank.
__________________
Will
________________________________

Hillstream/Boreno Loach Refuge

A Light Heart is Better than a Heavy Wallet.
Aquatic Delight is offline   Reply With Quote
Old 09-18-2013, 03:28 PM   #8
micheljq
Planted Tank Obsessed
 
micheljq's Avatar
 
PTrader: (0/0%)
Join Date: Oct 2012
Location: Quebec
Posts: 494
Default

Hello,

I think it's the black sand which does gives the impression there is less light, in fact it's real, there is less light because black sand reflects almost no light.

White sand will reflect the light a lot.

Michel.
__________________
Newbie with plants, Quebec.

Last edited by micheljq; 09-18-2013 at 05:06 PM.. Reason: typo
micheljq is offline   Reply With Quote
Old 09-18-2013, 03:44 PM   #9
Big O
Raider for life
 
Big O's Avatar
 
PTrader: (32/100%)
Join Date: Jun 2011
Location: KCMO
Posts: 820
Default Ding,ding,ding!

Quote:
Originally Posted by micheljq View Post
Hello,

I think it's the black sand which does gives the impression there is less light, in fact it's real, there is less light because black sand reflect almost no light.

White sand will reflect the light a lot.

Michel.
+1 on that!
Big O is online now   Reply With Quote
Old 09-18-2013, 03:44 PM   #10
jeffkrol
Wannabe Guru
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: WI
Posts: 1,735
Default

Quote:
Originally Posted by jeffkrol View Post
Probably an illusion..


You have somewhat the same thing I had. The 20gal was in the "open".. Then it was put in a more enclosed area.. light looks a lot "darker" there..

Oh and yes white vs dark sand is not helpful
jeffkrol is offline   Reply With Quote
Old 09-18-2013, 03:52 PM   #11
Legot
Planted Member
 
Legot's Avatar
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: Gilbert, Arizona
Posts: 251
Default

I'd also say that it's the black sand and maybe the height above the tank if they are different. Remember, black absorbs all wavelengths of light, and white reflects all.

In the end, the plants are getting more light than in the taller tank.
__________________
People are too often merely stating an assumed truth from flawed observation.

Last edited by Legot; 09-18-2013 at 03:53 PM.. Reason: changed
Legot is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 11:40 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012