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dkle 
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 Posted: December 09 2007 at 11:52am |
PAR stands for Photosynthetically Active Radiation, which is the amount of light usefull for photosynthesis that a bulb puts out. You can plug the ballasts and bulbs in this website http://www.reeflightinginfo.arvixe.com/selectperformancedata.php and find out what the performance are. Unfortunately, Sanjay didn't test for DE Hamilton and Iwasaki. By the way, PPFD (used in the website) is similar to PAR. I usually pay attention to PPFD, which is the actual light output; and the efficiency, which is PPFD divided by the amount of wattage used.
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If you can't bedazzle them with your brilliance, baffle them with your bs!
Dinhkim Le - Procrastinator extra-ordinare
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jpndave
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Posted: December 09 2007 at 2:38pm |
Here are a few numbers:
The Iwasaki is kind of an anomoly and only the 175W 15K with icecap has the performance. It is one of Sanjay's favorites. I think they now have a 250W double ended that is supposed to be really nice (it's new and hence wasn't availble when the tests were done). Iwasakis are more expensive then the others.
Iwasaki 15K 175W:
Phoenix 250w:
ALL PERFORMANCE DATA FOR LAMP:Phoenix HexArc 250W 14000K DE 2
| Spectrum |
Lamp |
Ballast |
Shield |
PPFD |
CCT |
Power |
Volts |
Amps |
Efficiency |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
PFO 250W HQI (M80) |
N |
106 |
0 |
323 |
122 |
2.81 |
0.3282 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
PFO 250W HQI (M80) |
Y |
85 |
0 |
323 |
122 |
2.81 |
0.2656 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
Blueline 250W Electronic |
N |
86 |
0 |
252 |
123 |
2.12 |
0.3421 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
Blueline 250W Electronic |
Y |
69 |
0 |
252 |
123 |
2.12 |
0.2758 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
Reef Fanatic 250W Electronic |
N |
92 |
0 |
258 |
123 |
2.18 |
0.3583 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
Reef Fanatic 250W Electronic |
Y |
74 |
0 |
258 |
123 |
2.18 |
0.2880 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
Icecap 250W Electronic |
N |
87 |
0 |
252 |
123 |
2.28 |
0.3456 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
Icecap 250W Electronic |
Y |
69 |
0 |
252 |
123 |
2.28 |
0.2774 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
EVC 250W Electronic |
N |
95 |
0 |
273 |
123 |
2.31 |
0.3513 |
| plot |
Phoenix HexArc 250W 14000K DE 2 |
EVC 250W Electronic |
Y |
77 |
0 |
273 |
123 |
2.31 |
0.2821 |
You can see that the 175 has as good or better numbers than the 250 accross the board. (you need to compare the shielded numbers as you need to run the shield on the DE, and the SE already has one.
The efficiency is Sanjay's rating PAR (re growth) per watt. I think the 15K Iwasakis is the highest efficiency short of the 6500K bulbs that are YELLOW!
Edited by jpndave - December 09 2007 at 2:50pm
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jpndave
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Posted: December 09 2007 at 2:46pm |
I checked and Iwasaki does have a 250W 14K DE. Their numbers are VERY impressive. Here is an excerpt from their catalog the red number is the rated light output in Lumens.
Website is here:
Catalog here:
Temp. Product Product Compatible Case Initial MOL LCL Diameter Life Fix. Burn
Watts (K) Bulb Code Description Ballast Qty. Lumens (mm) (mm) (mm) Hours CRI Req. Pos.
Double-Ended
250 14000 1 T9FC2 57753 MTD250AQUA/14K M80 24 15000 3 139 69.5 27.5 6000 NA E HOR+45°
Tubular Mogul Base
175 15000 1 T15 57713 MT175AQUA2/HOR M57 12 8500 1 211 129 48 6000 NA E HOR+15°
Edited by jpndave - December 09 2007 at 2:54pm
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eldiente
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Posted: December 09 2007 at 3:07pm |
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thank you again, I'm assuming it also has to be ordered, and not found locally.
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Brian
Twin Falls, Idaho
210 Gallon Glass reef
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dkle
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Posted: December 09 2007 at 5:23pm |
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That does look very promising. Thanks for the info Dave. Do you know of any place selling the 250w 14k DE bulbs yet?
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If you can't bedazzle them with your brilliance, baffle them with your bs!
Dinhkim Le - Procrastinator extra-ordinare
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dkle
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Posted: December 09 2007 at 5:34pm |
I actually found the link on Reefcentral talking about this bulb
http://reefcentral.com/forums/showthread.php?s=&threadid=1116512&perpage=25&pagenumber=1It looks like the PAR of the Iwasaki 250w DE bulb is a bit less than that of Phoenix. They explained that is because the Iwasaki has a built-in layer of UV protective coat while Phoenix doesn't. However, both will need a glass shield anyway. I'll stick with the Phoenix for now. I'll still need to read the whole thread though. Just got through 1 page so far.
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If you can't bedazzle them with your brilliance, baffle them with your bs!
Dinhkim Le - Procrastinator extra-ordinare
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dkle
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Posted: December 09 2007 at 5:42pm |
Prices are here http://www.coralreefecosystems.com/ltg_bulbs-mh.asp73 bucks. Definitely stick with Phoenix for now  .
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If you can't bedazzle them with your brilliance, baffle them with your bs!
Dinhkim Le - Procrastinator extra-ordinare
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jpndave
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Posted: December 09 2007 at 6:56pm |
I'll have to read that thread. I am commited to the SE bulbs (I have 4 of them, 1 for the current cube and 3 for an upcoming 180) at this point, they are supposed to be better in the lumenarc reflectors. That is per lumenarc. It has to do with the focal point on the reflectors, some other reasons too, but I forget exactly. Will have to go through my notes to recall.
I think that is the same place that I got my bulb, again, have to check to be sure. They are more expensive than some other bulbs. I really like the color though. I could never find one that was quite right, too yellow or too blue for my taste. These are just right IMO. Also, the 175 has excellent output.
I don't know much about the 250W version. All my research was before it was released.
How much are the phoenix bulbs?
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jpndave
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Posted: December 09 2007 at 6:57pm |
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There is a site somewhere that has comparison photos of most bulbs. I can't seem to find it. Does anyone have the link handy?
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jpndave
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Posted: December 09 2007 at 7:02pm |
LOL,  It is on that same site that sells the bulbs. I think there is still another that has Ushio and some others.
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dkle
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Posted: December 09 2007 at 7:14pm |
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the phoenix is around 55-65.
I don't have any experience with SE bulbs, so I can't really comment on their color or performance.
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If you can't bedazzle them with your brilliance, baffle them with your bs!
Dinhkim Le - Procrastinator extra-ordinare
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