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Search: Keyword(s): ; Posts Made By: jeffkrol
Forum: Lighting Today, 12:59 AM
Replies: 7
Views: 124
Posted By jeffkrol
I learn something new every day.. ;)

I learn something new every day.. ;)
Forum: Lighting Today, 12:52 AM
Replies: 163
Views: 13,729
Posted By jeffkrol
It is disappointing...

It is disappointing...
Forum: Lighting Today, 12:15 AM
Replies: 6
Views: 153
Posted By jeffkrol
http://www.aquatraders.com/LED-Aquarium-Lighting-E...

http://www.aquatraders.com/LED-Aquarium-Lighting-EVO-Freshwater-Plant-p/56546p.htm

http://www.aquatraders.com/LED-Aquarium-Lighting-EVO-Quad-Freshwater-Plant-p/56576p.htm
Forum: Lighting Yesterday, 02:17 PM
Replies: 6
Views: 153
Posted By jeffkrol
this will work. the spectrum can be tweaked.. ...

this will work. the spectrum can be tweaked..
http://reefbreeders.com/shop/photon-32/
Forum: Lighting Yesterday, 02:13 PM
Replies: 6
Views: 155
Posted By jeffkrol
Bit short in red: ...

Bit short in red:
http://current-usa.com/wp-content/uploads/2012/06/8000K_TrueLumen_Graph.jpg

Bump:

Mostly because they use .2W LED's........
Forum: Equipment 09-30-2014, 09:30 PM
Replies: 65
Views: 2,227
Posted By jeffkrol
how come I have the odd feeling you have the...

how come I have the odd feeling you have the wrong CGA nipple..or fitting on the tank......

It is flat on it's face w/ a groove on the face..

There isn't much to go wrong.. 2 flat faces w/ a...
Forum: Lighting 09-30-2014, 08:17 PM
Replies: 7
Views: 319
Posted By jeffkrol
Why not step into the 21st Century..? ...

Why not step into the 21st Century..?

http://www.aquatraders.com/LED-Aquarium-Lighting-Beamswork-Tropical-Fish-p/56327p.htm

;)
Forum: Lighting 09-30-2014, 04:35 PM
Replies: 31
Views: 692
Posted By jeffkrol
I prefer "discharging the quantum flux...

I prefer "discharging the quantum flux capacitor".... ;)
Forum: Lighting 09-30-2014, 01:57 PM
Replies: 31
Views: 692
Posted By jeffkrol
Only barely... and most is in the "violet" UV. ...

Only barely... and most is in the "violet" UV.
UV is on the whole, detrimental to life in general.
"far red" (>700nm) is mostly for "stretching"..
...
Forum: Lighting 09-29-2014, 04:38 PM
Replies: 31
Views: 692
Posted By jeffkrol
Seems there is 2 physical parameters using the...

Seems there is 2 physical parameters using the same terminology.

You have 1) "depth penetration" based on wavelength response (Beer-Lambert law) and you have
2) "depth penetration" based on ...
Forum: Lighting 09-29-2014, 04:26 PM
Replies: 163
Views: 13,729
Posted By jeffkrol
I tried not to imply that any was more accurate...

I tried not to imply that any was more accurate than another..The more data points the merrier.. ;)
And actually Apogee's "error" coefficients and sensor design are not very good for LED's..
The...
Forum: Lighting 09-29-2014, 03:57 AM
Replies: 4
Views: 208
Posted By jeffkrol
After looking at the board on fleabay some things...

After looking at the board on fleabay some things stuck out a bit..
The LED's are run in groups of 4 in series then the groups in parallel..
BUT it looks like the boards are "split" so to speak.....
Forum: DIY 09-28-2014, 02:16 PM
Replies: 21
Views: 801
Posted By jeffkrol
You can "guesstimate".. ...

You can "guesstimate"..
http://www.apogeeinstruments.com/conversion-ppf-to-lux/
Forum: Lighting 09-27-2014, 06:03 AM
Replies: 20
Views: 475
Posted By jeffkrol
There are some good tutorials of SMD soldering...

There are some good tutorials of SMD soldering using an electric fry pan.
"good" soldering irons can be used as well as heat guns..

Requires a "board" of course and special solder.. ect.. ect.. ...
Forum: Lighting 09-27-2014, 05:44 AM
Replies: 20
Views: 475
Posted By jeffkrol
My 2 cents: I still like the channel control of...

My 2 cents:
I still like the channel control of a RGBWh multi LED array..
but this is not for everyone.
It is about the only thing that doesn't make me jump cartwheels over this tech.

for...
Forum: Lighting 09-27-2014, 05:22 AM
Replies: 20
Views: 475
Posted By jeffkrol
No, I've got a small tank that I want to try the...

No, I've got a small tank that I want to try the dimmable "pre-builts" on..
http://store.yujiintl.com/products/high-cri-led-spotlight-1
These w/ 60 degree optics..
Beam angle on the PAr lamps are...
Forum: Lighting 09-27-2014, 05:13 AM
Replies: 20
Views: 475
Posted By jeffkrol
Same concept, different company. I've posted this...

Same concept, different company. I've posted this numerous times in the past..
http://www.yujiintl.com/high-cri-led-lighting

http://www.yujiintl.com/img/graphics/delta-comp960.jpg

2700k.. a...
Forum: Lighting 09-26-2014, 10:26 PM
Replies: 3
Views: 132
Posted By jeffkrol
s.l is correct.. "but" you do have effectively...

s.l is correct.. "but" you do have effectively 2wpg.. ;)
Forum: Lighting 09-26-2014, 09:26 PM
Replies: 3
Views: 167
Posted By jeffkrol
dimmable.. non-dimmable, how many channels.. ...

dimmable.. non-dimmable, how many channels..

you certainly can make it better for you and the plants..
but first more details..
Forum: Lighting 09-26-2014, 09:18 PM
Replies: 4
Views: 125
Posted By jeffkrol
Many, many years ago I wired some t''somethings...

Many, many years ago I wired some t''somethings to dimable ballasts.. They were expensive..
...
Forum: Lighting 09-24-2014, 02:52 AM
Replies: 6
Views: 188
Posted By jeffkrol
Though I mostly agree.. but this also sounds...

Though I mostly agree.. but this also sounds better than it probably is..

ONE red and ONE green w/ 3 purple on the same channel..


Best to shut the RB channel down all together.. and see what...
Forum: Lighting 09-24-2014, 02:36 AM
Replies: 6
Views: 188
Posted By jeffkrol
Pretty cool light.. Maybe consider using one of...

Pretty cool light..
Maybe consider using one of it's advertised "features"..


Reconfigure for a planted tank... ;)
...
Forum: Lighting 09-23-2014, 09:59 PM
Replies: 15
Views: 369
Posted By jeffkrol
True within reason but certainly not true re: ...

True within reason
but certainly not true re: say Apogee vs Li-Cor vs "home built" vs others ect

http://www.licor.com/env/pdf/light/TechNote126.pdf

But we are splitting hairs a bit here........
Forum: Lighting 09-23-2014, 06:55 PM
Replies: 15
Views: 496
Posted By jeffkrol
Yep.. and a lot has been done on algae (boo) and...

Yep.. and a lot has been done on algae (boo) and zooxanthellae ( endosymbiotic (http://en.wikipedia.org/wiki/Endosymbiotic) dinoflagellates (http://en.wikipedia.org/wiki/Dinoflagellates),unicellular...
Forum: Lighting 09-23-2014, 06:48 PM
Replies: 26
Views: 741
Posted By jeffkrol
more to think about here: ...

more to think about here:
http://www.plantedtank.net/forums/showthread.php?t=727113
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