Does any one know the par for a 250W Reeflux 10K

jakano · 11/23/2008, 11:34 AM

I have been searching and searching and I cant find any numbers at all on the bulbs. I have found every other bulb but not these. They are not on Sanjay's website and I have been searching RC for a while now with no luck.

jakano · 11/23/2008, 01:33 PM

Sorry I forgot to add I am looking for the DE bulb version.

hahnmeister · 11/23/2008, 02:37 PM

10 micromols/m2/s @ 10' away w/o a reflector.

jakano · 11/23/2008, 03:18 PM

Well how about at 36" with a reflector? Sorry I am sure with that equation I should be able to figure it out but math is not on of my strong suits. I understand it ( sort of) 10 micromols in a square meter measured at a one second time interval? Just don't know how that translates to par readings.
I also know that with different reflectors comes different readings so obviously I am just looking for what info might have already been posted from people using what equipment they have so I know a ballpark figure for these bulbs. Im actually leaning more towards a set of ushio 14k bulbs with 2 actinic t-5's but I already happen to have a new reeflux bulb I have never used so I might just get a second to run a pair.

jakano · 11/23/2008, 05:13 PM

Hey Hahn I have been reading some threads where you go to great lengths explaining the ways to measure light and par. Where did you learn all of this stuff, just from reading up on it or do you have some schooling on this subject? Ill tell you what I was reading was fascinating stuff.

hahnmeister · 11/23/2008, 06:32 PM

Well, yes, there is some university education as far as lighting goes... but it really comes down to taking 'engineering' calc (if that), calc based physics (focus on electricity/EM/optics... freshmen/sophmore level physics for engineering majors), and maybe a little bit of my EM fields course... oh, and as far as 'efficiency', maybe a little bit of thermodynamics... just the most basic understanding in each subject will do as most of it really just comes down to geometry. Other than that, its just having a PAR meter, and reading all the stuff that people like Sanjay Joshi, Dana Riddle and Paul Erik Hirvonen have done over the years.

11/23/2008, 11:34 AM	#1
jakano Registered Member Join Date: Feb 2004 Location: columbus ohio Posts: 1,562	Does any one know the par for a 250W Reeflux 10K I have been searching and searching and I cant find any numbers at all on the bulbs. I have found every other bulb but not these. They are not on Sanjay's website and I have been searching RC for a while now with no luck.

11/23/2008, 03:18 PM	#4
jakano Registered Member Join Date: Feb 2004 Location: columbus ohio Posts: 1,562	Well how about at 36" with a reflector? Sorry I am sure with that equation I should be able to figure it out but math is not on of my strong suits. I understand it ( sort of) 10 micromols in a square meter measured at a one second time interval? Just don't know how that translates to par readings. I also know that with different reflectors comes different readings so obviously I am just looking for what info might have already been posted from people using what equipment they have so I know a ballpark figure for these bulbs. Im actually leaning more towards a set of ushio 14k bulbs with 2 actinic t-5's but I already happen to have a new reeflux bulb I have never used so I might just get a second to run a pair. Last edited by jakano; 11/23/2008 at 03:24 PM.

11/23/2008, 01:33 PM	#2
jakano Registered Member Join Date: Feb 2004 Location: columbus ohio Posts: 1,562	Sorry I forgot to add I am looking for the DE bulb version.

11/23/2008, 02:37 PM	#3
hahnmeister Moved On Join Date: Sep 2005 Location: Brew City, WI Posts: 10,156	10 micromols/m2/s @ 10' away w/o a reflector.

11/23/2008, 05:13 PM	#5
jakano Registered Member Join Date: Feb 2004 Location: columbus ohio Posts: 1,562	Hey Hahn I have been reading some threads where you go to great lengths explaining the ways to measure light and par. Where did you learn all of this stuff, just from reading up on it or do you have some schooling on this subject? Ill tell you what I was reading was fascinating stuff.

11/23/2008, 06:32 PM	#6
hahnmeister Moved On Join Date: Sep 2005 Location: Brew City, WI Posts: 10,156	Well, yes, there is some university education as far as lighting goes... but it really comes down to taking 'engineering' calc (if that), calc based physics (focus on electricity/EM/optics... freshmen/sophmore level physics for engineering majors), and maybe a little bit of my EM fields course... oh, and as far as 'efficiency', maybe a little bit of thermodynamics... just the most basic understanding in each subject will do as most of it really just comes down to geometry. Other than that, its just having a PAR meter, and reading all the stuff that people like Sanjay Joshi, Dana Riddle and Paul Erik Hirvonen have done over the years.