Lighting Website Updates - Page 39

grandp10 · #**951** 07/06/2007, 05:52 AM

250 watt, thanks.

JCTewks · #**952** 07/06/2007, 10:47 PM

I've got the Hamilton...nice color, although the par isn't the best. I run with one PC actinic and it looks really crisp white with just a touch of blue. the PC got switched off once though and I could barely tell the difference....looks pretty good by itself too.

hahnmeister · #**953** 07/07/2007, 07:46 AM

Sanjay, thought you might find this interesting...
http://archiv.korallenriff.de/Lichttest/T5-1.pdf

Its an english version of a long term T5 test over a 490g tank. One of the conclusions is that excessive blue light hinders coral growth. I find this interesting since the PAR/PUR comparison of the PFO Solaris claims the excessive blue output of the LED's is good for corals...

Also, this...
http://archiv.korallenriff.de/Artikel_Kelvin.pdf

Its german, but its interesting. Perhaps Ill work on an English version.

Sanjay · #**954** 07/07/2007, 10:06 AM

Thanks.

I have always felt that broad spectrum lights tend to favor growth, when compared to lights in narrow spectral ranges.
Also, the corals tend to look more vibrant than the washed out look of the blue light.

Interestingly, they would recommend changing lamps out at 9 months. 30% loss of light intensity can be easily compensated by lowering the lights. For those that hang the lights this adjustment is a lot easier to make, and they can get more out of the lamps.

The 2nd article, seems to be a more general description of spectrum and color temperature, and not as interesting as the first one.

sanjay.

grandp10 · #**955** 07/07/2007, 10:12 AM

Sanjay, what size Lumenarc would you recommend for a 48"l x 24" w x24" h 120 gallon aquarium? I would be using 2 reflectors. I have gotten mixed opinions on which to go with. Thank you very much.

hahnmeister · #**956** 07/07/2007, 03:58 PM

Sanjay,
Those Fauna Marin units use an active cooling system that I feel isnt enough for T5s. Its a solution that is quiet and 'stealthy', but it only cools one end of the bulbs well. FWIW, I am at 18 months and still have 70% of my output.... but my fan/cooling is much more aggressive. Usually, on systems like that one used, they also use those clip on 120mmx3 fan banks to help cool the bulbs from underneath at each end of the tank. This time... not so. 30% in 9 months is a bit high IMO. More cooling would keep those bulb outputs higher.

But you are right... lowering the units would make up for that 30% drop, and allow the lights to last a nice 18 months. Add some better cooling, and thats why I have no problem saying T5s will last 2 years... esp the blue ones. They seem to last better than the daylight ones even. They are much less sensitive to heat buildup as well as far as I have tested.

The Grim Reefer · #**957** 07/07/2007, 04:45 PM

Don't forget about spectrum shift. I've been told by someone in a position to know that the Fluorescent lamps have a noticable spectrum shift within 6 months. You ever get your spectrometer set up Hahn?

The cooling on a FM seems to be enough to keep the output up there. The ATI's use the same method of drawing air in from one end near the lamps, across the ballasts and out the top. It really doesn't take much air movement to keep the lamps happy. The 30% loss of light in 9 months doesn't jive with what I have seen even with an overdriven 80 watt system but then again I am measuring PAR, not Lux. That could be an interesting experiment in it'self, PAR vs Lux loss over a given time period

JCTewks · #**958** 07/08/2007, 01:26 AM

Quote:

Originally posted by grandp10
Sanjay, what size Lumenarc would you recommend for a 48"l x 24" w x24" h 120 gallon aquarium? I would be using 2 reflectors. I have gotten mixed opinions on which to go with. Thank you very much.

My 2 cents is that you should get the Luminarc L3...they are 19 5/8" square. with 2 of them you get 100% coverage of the tank and still have room for a T5 front and back for actinic if you want. I'll be doing that on my new tank with the same dimensions, only i'm also going to try and squeeze 4 24" T5's on there as well.

hahnmeister · #**959** 07/08/2007, 02:13 AM

Well, phosphor based bulbs do tend to diminish right off the bat by a good percentage during the first month or so... then they seem to level out for the long haul.

Yes, the spectrometer is up... although as Sanjay pointed out, I didnt get the $700 calibration bulb yet, so my readings are all relative.

The Grim Reefer · #**960** 07/08/2007, 03:17 PM

Quote:

Originally posted by hahnmeister
Well, phosphor based bulbs do tend to diminish right off the bat by a good percentage during the first month or so... then they seem to level out for the long haul.

Yes, the spectrometer is up... although as Sanjay pointed out, I didnt get the $700 calibration bulb yet, so my readings are all relative.

Even uncalibrated you should be able to check for a spectrum shift. Don;t you have some GE 6500's? If you have a new one and some you've been using you should be able to see a difference if my source is correct. Like I said according to him at six months there is a noticable shift. If you can test used and unused lamps from the same lot it should be the best way to see if there is a noticable shift.

hahnmeister · #**961** 07/09/2007, 12:33 AM

That is true, but no, I dont have any GE 6500Ks that I have used for a while. I have a couple that I used for testing, and thats it. Hevent actually used them (* they are the older GE6500Ks as well).

The Grim Reefer · #**962** 07/09/2007, 01:01 AM

Bummer.

LUCKY42032 · #**963** 07/17/2007, 10:09 AM

Sorry to be a little off topic...Does anyone know where to order BLV "Nepturion" 14000K bulbs from here in the US?

xabo · #**964** 07/17/2007, 04:11 PM

http://www.marinedepot.com/ps_ViewIt...ct~MB8617.html

LUCKY42032 · #**965** 07/18/2007, 02:02 PM

So the Ushio is the same as the BLV "Nepturion" 14000K

xabo · #**966** 07/18/2007, 02:05 PM

Yes

fishcraze2002 · #**967** 07/25/2007, 09:36 AM

Sanjay, Have you tested the new 250w DE 14K Iwasaki bulb or published the result yet?

Wonder if these bulbs are available on the market yet? and who's selling them?

hahnmeister · #**968** 07/25/2007, 12:11 PM

http://archive.reefcentral.com/forum...5&pagenumber=1

fishcraze2002 · #**969** 07/25/2007, 09:44 PM

Quote:

Originally posted by hahnmeister
http://archive.reefcentral.com/forum...5&pagenumber=1

Thanks for the link

mile sq. reefer · #**970** 07/29/2007, 10:04 AM

Sanjay, I know you are a busy man and thank you for all the work you have done in the field of reef lighting. Will you be testing these 150w HQI lamps any time soon: Pheonix 14k, Hamilton 14k, Geissamnn 14.5k and the Reeflux 12k. Thanks, Mile.

hahnmeister · #**971** 07/30/2007, 12:29 AM

Hamilton 250wattDE, Elos 250wattDE, Fauna Marin 250wattDE... the list goes on...

Sanjay · #**972** 07/30/2007, 06:53 AM

Who carries these lamps ? Arrange to have the lamps sent to me and I will eventually get to them

Most likely at MACNA I'll make my trips around the vendor's booth and see what new lamps I can have sent to me, and get the back log cleared in the meantime.

sanjay.

mile sq. reefer · #**973** 07/30/2007, 08:03 PM

Hey hahn, i know the list is extensive, but this question was directed towards Sanjay. These lamps seem to be popular with many members on this site and was wondering if any analysis was going to be done to inform us, the hobbyist, of quality lamps. Thats all. Thanks. Mile.

hahnmeister · #**974** 07/30/2007, 08:15 PM

I believe he has already done the G-man 14,500K. Its listed as the 13,000K Coral... the 13,000K may be a mistake. Its either that, or the Giesemann 13,000K Marine bulb. I think Sanjay did do the Reeflux in a recent article... just didnt put the results in the archive yet?

He needs a Hamilton14,000K DE to test as well. The only reason I butted in is because I know several pages back I asked the same thing.

mile sq. reefer · #**975** 07/30/2007, 09:04 PM

Thats cool. Thanks for the info. How do we know which is which? Also is the 150w Pheonix similar to the 250w, not in PAR but its spectral analysis? Hahn what is your recommendation for the best 150w HQI bulb (PAR and color) run on an electronic ballast?