Lighting Website Updates - Page 8

Deuce67 · #**176** 09/06/2005, 09:16 PM

Hi Sanjay! Got a question. It seems there is a big difference in PPFD between the shielded and non shielded test. Im not sure what you used for a shield but, do you think PPFD would go up if you use some type of a low iron glass or clearer glass thats still capable of blocking UV? Im running 150 de on an hqi ballast using 10k xde. Shielded is 61 and non shielded is 77. Pretty big diff. Thanks!

Sanjay · #**177** 09/07/2005, 07:09 AM

Well, with a DE lamp you are going to have to run it with the glass shield on the fixture. Its possible that a low iron glass may increase the light output. I have not tested this... something I should do one of these days. In general I have seen a loss of about 15-20% due to the glass shield used (depends on the lamp's spectral output). I basically place the glass shield over the sensor when I test the lamps as "shielded".

Anyone know where I can find a smallish peice of thin low iron glass ?

sanjay.

reefcrazed · #**178** 09/07/2005, 07:24 AM

Has XM done anything to increase the par ON THEIR 15k'S YET?

Travis · #**179** 09/07/2005, 01:09 PM

But would a low iron glass shield still block the harmful uv rays from the DE bulb? I guess you could check the spectrum when you get a piece to test Sanjay.

Deuce67 · #**180** 09/07/2005, 05:21 PM

Ahhh! Somebody please send Sanjay a piece of low iron glass!

dukecola · #**181** 09/10/2005, 08:13 PM

Quote:

Originally posted by Reefvet
Fortunately corals don't understand PAR.

I've grown beautiful corals for years, several decades actually, with bulbs that would be tossed aside given today's mathematical criteria.

You are so right!

I grew awesome corals with three 175W 5500k Hamiltons. I'd be laughed at today for using them. Heck, we were thrilled when the 6500k bulb came out! When will the insanity end.

Sanjay · #**182** 09/10/2005, 11:23 PM

Quote:

Originally posted by dukecola
You are so right!

I grew awesome corals with three 175W 5500k Hamiltons. I'd be laughed at today for using them. Heck, we were thrilled when the 6500k bulb came out! When will the insanity end.

Well, this should be enough evidence that corals do actually understand PAR. :-) its the spikey blue spectrum that they could care less about.

sanjay.

capnskunk · #**183** 09/13/2005, 12:43 PM

Sanjay,

Have you tested or even heard of South Pacific Sunlight bulbs? I havent heard anything about them. I did fire a 20K up on a PFO HQI 400w ballast. It has a similar color to a XM 400w 20K on the same ballast, but I was wondering its PPFD. I can send you a couple bulbs for testing if you want. Thanks.

wfgworks · #**184** 09/14/2005, 07:42 PM

Sanjay

Have you gotten any of the new BLV/Ushio 14K bulbs yet?

I know they are not available here in the US market buy are available overseas.

Sanjay · #**185** 09/15/2005, 07:19 AM

Quote:

Originally posted by capnskunk
Sanjay,

Have you tested or even heard of South Pacific Sunlight bulbs? I havent heard anything about them. I did fire a 20K up on a PFO HQI 400w ballast. It has a similar color to a XM 400w 20K on the same ballast, but I was wondering its PPFD. I can send you a couple bulbs for testing if you want. Thanks.

I think these are the bulbs being sold by SDC. Sure go ahead and send me the bulbs, but only if you are not in a hurry to get them back. I am way back logged with work, and light testing has to take a back seat for a bit.

I am just about 1/2 way through testing the 175W lamps.

sanjay.

Sanjay · #**186** 09/15/2005, 07:19 AM

Quote:

Originally posted by wfgworks
Sanjay

Have you gotten any of the new BLV/Ushio 14K bulbs yet?

I know they are not available here in the US market buy are available overseas.

I have not got them yet. Guys at Ushio told me that they will get me a sample.

sanjay.

want2reef · #**187** 09/18/2005, 09:02 PM

Sanjay

Is the EVC tech ballast, the same spec wise as the Reeffanatic ballast.

Thanks,

Kevin

Sanjay · #**188** 09/19/2005, 07:42 AM

Almost all electronic ballasts seem to be quite similar to each other in performance, and the variation in performance is quite small.

sanjay.

capnskunk · #**189** 09/19/2005, 09:57 AM

Sanjay,

PM me where you want me to send the bulbs and Ill get them over to you. And Im in no hurry to get them back.

MARSHALL MANN · #**190** 09/19/2005, 10:28 PM

Sanjay just wondering if you think there is a big loss of par by using electronic ballast v m80s or hqi ballasts 250 and 400 watt

MM

Herbert T. Kornfeld · #**191** 09/19/2005, 10:30 PM

Why dont you see for yourself? Thats what the site is for.

Psyire · #**192** 09/20/2005, 03:28 PM

According to Vince w/ OceanEncounter, the EVC ballast is a different ballast than the reeffanatic ballast. How similar they are... well I have no idea.

Herbert T. Kornfeld · #**193** 09/20/2005, 04:36 PM

Sanjay, would you consider doing some 1000watters for comparison? I would send you what you need. I have a PFO 220v ballast, lumenarc3, and two bulbs....a 14,000K hamilton, and a 20,000K (forget by who right now). I would like to see if all the extra wattage really translates into that much more output...from looking into those results on the happy reefing DE bulbs...I might consider two of those instead of a single 1000...or something along those lines...

Or is there some other reasoning for why those Happy Reefing 400wattDE bulbs scored sooooo high? Some negating factor or something? Their spectral plots seem all over the place as well.

Sanjay · #**194** 09/21/2005, 06:43 AM

Quote:

Originally posted by Herbert T. Kornfeld
Sanjay, would you consider doing some 1000watters for comparison? I would send you what you need. I have a PFO 220v ballast, lumenarc3, and two bulbs....a 14,000K hamilton, and a 20,000K (forget by who right now). I would like to see if all the extra wattage really translates into that much more output...from looking into those results on the happy reefing DE bulbs...I might consider two of those instead of a single 1000...or something along those lines...

Or is there some other reasoning for why those Happy Reefing 400wattDE bulbs scored sooooo high? Some negating factor or something? Their spectral plots seem all over the place as well.

I could do hte 1000W lamps, one of hte reaswons for not doing any so far always has been that the ballasts are 220V. I do not have 220V outlets nearby.

those HR lamps are not really sooo high in output. Infact there are 400W moguls that come close to them at 1/2 the cost.

sanjay.

want2reef · #**195** 09/26/2005, 08:42 PM

Sanjay,

Which reflector are you using on your SE tests?

Thanks,
Kevin

Sanjay · #**196** 09/27/2005, 07:31 AM

Go to my website and look at the following articles for all the reflectors tested. They are listed in the articles section.

Joshi, S. and Marks, Timothy, 2003. Analyzing Reflectors: Part 1 - Mogul Reflectors, Advanced Aquarist, March 2003
Joshi, S. and Marks, Timothy, 2003. Analyzing Reflectors: Part II - Double Ended Lamp Reflectors, Advanced Aquarist, July 2003.
Joshi, S. and Marks, Timothy, 2004. Analyzing Reflectors: Part III, Advanced Aquarist, March 2004.
Joshi, S. 2004. Analyzing Reflectors: 400W DE Reflectors, Advanced Aquarist, Dec. 2004.

sanjay.

want2reef · #**197** 09/29/2005, 07:45 PM

Sanjay,

Sorry but I did'nt see where it specified which reflector you used on the SE tests. Or did you use different reflectors during your tests?

Thanks
Kevin

Sanjay · #**198** 09/29/2005, 11:19 PM

Quote:

Originally posted by want2reef
Sanjay,

Sorry but I did'nt see where it specified which reflector you used on the SE tests. Or did you use different reflectors during your tests?

Thanks
Kevin

Ahh.. I think I understand what you are asking. When I test the lamps by themselves I test them without a reflector.

sanjay.

MARSHALL MANN · #**199** 09/29/2005, 11:46 PM

Sanjay
i have a 300 gal. starphire 96 L X 30 deep x 24 tall

im going to be running 3 400 hqi pfo pendants for daylights
and 2 250 20k moguls for dawn to dusk

just wondering what hqi lamps and wich 20k lamps you recomend for this applicacation

the tank will be a combo of clams, lps, montis and a few table acros

any suggestions would be great
thanks MM

Waidesworld · #**200** 10/18/2005, 11:54 AM

Has anyone thought of introducing Blue LED lighting for the night effects? Surely the cost savings on power will be enormous. Currently we are experimenting with land plants and blue/red LEDs but I know blue is good for corals. Our wavelength is 464nm on our current product offering with a constant cutrrent draw of 350mA and a power of 7.2Watts. The luminous flux of this is 48 Lumens.