How's my PAR??

C3hutson · 09/23/2015, 05:08 PM

75 gallon with 2x250watt 20k Radiums in lumenbright mini pendants. Powered by blue (new style) electronic ice caps. This was using an apogee QM-200 with powerheads off. Bottom of the reflector is 12" off waterline, which I think puts the bulbs around 16". I've noticed the hotspot of this reflector is the opposite side from the mogul socket... they are oriented so that the mogul socket aims directly into the back corners, so the hotspot is essentially over the middle of the front portion of the tank.

slief · 09/23/2015, 05:19 PM

Hard to read but the numbers looks decent to me!

Bigcefa · 09/23/2015, 10:57 PM

Yea hitting 200 on sand bed doing just fine

shifty51008 · 09/24/2015, 01:12 AM

May be a dumb question but wouldnt you wanna check par with your pumps on as normal as that will be the way the light hits the corals?

alton · 09/24/2015, 05:22 AM

Loosen the wing nuts and slide your lamps back and forth to get more even light.

jedimasterben · 09/24/2015, 08:12 AM

Quote:

Originally Posted by shifty51008

May be a dumb question but wouldnt you wanna check par with your pumps on as normal as that will be the way the light hits the corals?

Won't have any effect. Surface agitation can cause the light to be +/- 50% of the measured intensity and it cancels out.

C3hutson · 09/24/2015, 08:31 AM

Quote:

Originally Posted by alton

Loosen the wing nuts and slide your lamps back and forth to get more even light.

I'll try that today!

FullBoreReefer · 09/24/2015, 08:34 AM

I must be blind, I don't see any numbers lol

C3hutson · 09/24/2015, 08:37 AM

haha I'll reupload with some editing to help the blind

FullBoreReefer · 09/24/2015, 08:39 AM

Ohhhhh now I see them haha

The number on the sand bed looked kinda like a frag to me lol. Numbers don't look bad, but I agree, I'd fire up the tank as normal and recheck. It may not be far off but you never know...

C3hutson · 09/24/2015, 08:41 AM

There we go.

C3hutson · 09/24/2015, 09:21 AM

Quote:

Originally Posted by alton

Loosen the wing nuts and slide your lamps back and forth to get more even light.

Oh wow, they weren't even close to being centered... The inner bulb (SE bulbs) was basically more towards the socket hole than the center. I'll retest.

Quote:

I'd fire up the tank as normal and recheck. It may not be far off but you never know...

I'll retest per above. Problem was I run fairly aggressive standing wave and that causes some pretty big fluctuations. It's just easier to get a stable number with flow off.

C3hutson · 09/24/2015, 10:13 AM

My God... fixing the bulb alignment did wonders. This is with pumps on as well. Tank even visually looks much brighter and more evenly lit.

09/23/2015, 05:08 PM	#1
C3hutson Moved On Join Date: Feb 2015 Posts: 358	How's my PAR?? 75 gallon with 2x250watt 20k Radiums in lumenbright mini pendants. Powered by blue (new style) electronic ice caps. This was using an apogee QM-200 with powerheads off. Bottom of the reflector is 12" off waterline, which I think puts the bulbs around 16". I've noticed the hotspot of this reflector is the opposite side from the mogul socket... they are oriented so that the mogul socket aims directly into the back corners, so the hotspot is essentially over the middle of the front portion of the tank.

09/23/2015, 05:19 PM	#2
slief RC Sponsor Join Date: Sep 2009 Posts: 14,173	Hard to read but the numbers looks decent to me! __________________ Director Customer Support Royal Exclusiv USA For All Royal Exclusiv & Bubble King questions please refer to our Sponsor forum: http://www.reefcentral.com/forums/fo...play.php?f=745 Current Tank Info: 480G display mixed reef, 90G sump, 90G refugium, 60G display refugium. Check out my build thread: http://www.reefcentral.com/forums/showthread.php?t=1783476

09/24/2015, 01:12 AM	#4
shifty51008 12-5 Chiefs record Join Date: Mar 2010 Location: NW Iowa Posts: 10,134	May be a dumb question but wouldnt you wanna check par with your pumps on as normal as that will be the way the light hits the corals? __________________ 75 gal. mixed DT, 100 gal. sump, 50 gal. fuge, Clownfish breeder

09/24/2015, 08:34 AM	#8
FullBoreReefer Registered Member Join Date: Jul 2010 Location: Wooster, OH Posts: 1,862	I must be blind, I don't see any numbers lol __________________ 60x36x24 mixed reef. 40b sump. Regal 250int Varios. 4xHydra26HDs+t5s. 4xMp40wes. Apex2016.

09/24/2015, 08:39 AM	#10
FullBoreReefer Registered Member Join Date: Jul 2010 Location: Wooster, OH Posts: 1,862	Ohhhhh now I see them haha The number on the sand bed looked kinda like a frag to me lol. Numbers don't look bad, but I agree, I'd fire up the tank as normal and recheck. It may not be far off but you never know... __________________ 60x36x24 mixed reef. 40b sump. Regal 250int Varios. 4xHydra26HDs+t5s. 4xMp40wes. Apex2016.

09/23/2015, 10:57 PM	#3
Bigcefa Registered Member Join Date: Apr 2010 Posts: 843	Yea hitting 200 on sand bed doing just fine

09/24/2015, 05:22 AM	#5
alton Registered Member Join Date: Jan 2005 Location: Zuehl, Texas Posts: 4,460	Loosen the wing nuts and slide your lamps back and forth to get more even light.

09/24/2015, 08:37 AM	#9
C3hutson Moved On Join Date: Feb 2015 Posts: 358	haha I'll reupload with some editing to help the blind

09/24/2015, 08:41 AM	#11
C3hutson Moved On Join Date: Feb 2015 Posts: 358	There we go.

09/24/2015, 10:13 AM	#13
C3hutson Moved On Join Date: Feb 2015 Posts: 358	My God... fixing the bulb alignment did wonders. This is with pumps on as well. Tank even visually looks much brighter and more evenly lit.