PAR Meter
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 10-28-2013, 04:26 PM   #1
pgaron
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2013
Location: Providence RI
Posts: 88
Talking

PAR Meter


Hey guys, is there anyone willing to test an LED with a PAR meter for me. I have a bunch of LED's but I have 0 specs on them. I'd be mailing this to you and you can keep it afterword's
pgaron is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 10-29-2013, 10:23 PM   #2
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,650
Default

To test an LED you need a DC power supply with adequate, but not too much voltage output, and a LED driver, or other method for maintaining a constant current, which will work to give you at least two different currents, like 350 and 700 mAmps. Either you will have to supply those parts, or only someone who just happens to have them will be able to do this.

I'm assuming you really meant an LED and not a light made with LEDs.
__________________
Hoppy
Hoppy is online now   Reply With Quote
Old 10-30-2013, 11:04 AM   #3
pgaron
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2013
Location: Providence RI
Posts: 88
Default

[QUOTE=
I'm assuming you really meant an LED and not a light made with LEDs.[/QUOTE]

I am referring to an E27 style bulb wit LED. A plug and play style one. Thus far no one has offered on this forum but on Reddit r/planted tank someone offered I shipped it to him yesterday 1 day shipping so provided he has some time I should be able to get some results soon
pgaron is offline   Reply With Quote
Old 10-30-2013, 11:48 AM   #4
dzega
Planted Tank Obsessed
 
PTrader: (0/0%)
Join Date: Apr 2013
Location: Latvia, EU
Posts: 392
Default

show me the bulb, i will measure over the internet
seriously tho, if i can see the led chip in details
dzega is offline   Reply With Quote
Old 10-30-2013, 03:19 PM   #5
pgaron
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2013
Location: Providence RI
Posts: 88
Default

These LED's are soldered to a board IDK if that's still usefull
pgaron is offline   Reply With Quote
Old 10-30-2013, 04:04 PM   #6
dzega
Planted Tank Obsessed
 
PTrader: (0/0%)
Join Date: Apr 2013
Location: Latvia, EU
Posts: 392
Default

just give an info on the bulb and a pic.
dzega is offline   Reply With Quote
Old 10-30-2013, 04:36 PM   #7
pgaron
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2013
Location: Providence RI
Posts: 88
Default

Here are the bulbs I cant take an actual picture at the moment but they are really generic and cheap. they all work though
pgaron is offline   Reply With Quote
Old 10-30-2013, 09:15 PM   #8
dzega
Planted Tank Obsessed
 
PTrader: (0/0%)
Join Date: Apr 2013
Location: Latvia, EU
Posts: 392
Default

I've tried 445nm and 660nm Chinese chips. With high probability the same ones inside that bulb. Works really well. My par meter is put a green plant wich turns red in strong light and wait if it does

Using two thirds the luminiscent bulb wattage these led passed the test on two species. One being ludwigia repents green, other don't remember. How do I navigate on iPad through text? There is no arrows on the damn keyboard
dzega is offline   Reply With Quote
Old 10-31-2013, 05:12 AM   #9
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,650
Default

Quote:
Originally Posted by dzega View Post
How do I navigate on iPad through text? There is no arrows on the damn keyboard
Yes, that is a problem. If you have steady hands, and not too big fingers, you can tap where you want the cursor to be on the text, and it will appear there, or at least close to where you tap. Personally I don't like using my iPad for typing stuff.
__________________
Hoppy
Hoppy is online now   Reply With Quote
Old 10-31-2013, 03:03 PM   #10
pgaron
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2013
Location: Providence RI
Posts: 88
Default

Hmm. interesting, so you believe there is a strong chance these LED's are the same. If so how are you utilizing them. # of bulbs, gallons ect
pgaron is offline   Reply With Quote
Old 10-31-2013, 05:56 PM   #11
dzega
Planted Tank Obsessed
 
PTrader: (0/0%)
Join Date: Apr 2013
Location: Latvia, EU
Posts: 392
Default

I used led chips separately. With external driver. That light promoted growth way better than similar wattage sylvania grolux tube wich Is considered being classic of growing light

I can't press in the middle of the word on this damn iPad. Cursor appears at the end of the word no matter where I press. There was no such problem on android tablet
dzega is offline   Reply With Quote
Old 10-31-2013, 06:59 PM   #12
pgaron
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2013
Location: Providence RI
Posts: 88
Default

droid for life. and I think these lights are making my plants burn through nutrients. I had to buy some dry fert because with 7 comet feeders in there for nitrates and nitrites I have gotten 0ppm 4 weeks now I had considered not doing 25% waterchanges anymore but ferts are on the way
pgaron is offline   Reply With Quote
Old 11-04-2013, 11:37 AM   #13
pgaron
Algae Grower
 
PTrader: (0/0%)
Join Date: Oct 2013
Location: Providence RI
Posts: 88
Default

So that guy from reddit tested my lights heres the results "The light tested at 13 inches from the light - directly under the light is 95umol, and decreases by about 10umol every centimeter from the center (the center circle was about 2 inches wide), finally zeroing out about 4.5 inches or so from the center. "
pgaron 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 04:37 AM.


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