20K Ushio 400 watt MH

Chris Lakies · 01-05-2003, 07:10 PM

Has anyone used or seen the 20K Ushio's yet? I was wondering if they are a tad less blue or more blue than Radiums. Any Pictures?? Please post.

PerryinCA · 01-06-2003, 12:53 PM

They are about as blue when run on the same ballast, however, the Ushio seem to have more of a blue coloration as opposed to a bluish-violet to my eye at least. I would say that the two look very similar. When looking at the spectral signature, the ushio has a peak at 410, 450, 547, 575, and the radium has a peak at 450. The Ushio appears to have more actinic light according to some sources. All in all, it really is a close draw. Current research shows that increases in blue light lead to more blue coloration (reflection), so the radium may be a better bet for coloration. Although, as a standalone, the Ushio may give better growth. It's tough to tell without some good studies...

I would say that all together, they are pretty similar lamps.

-Perry
Sunlight Supply, Inc.

Chris Lakies · 01-06-2003, 12:56 PM

Thanks Perry,

Chris

Hippopus · 01-07-2003, 05:26 PM

I have four Ushio 20,000k 400 watt lights on my tank and I really like them!!! They are alittle more blue than the radiums. I am comparing my Ushios against a friend who just install 400 watt Radiums. Now he is using the PFO HQI ballast and I use PFO regulator ballast. I also use 2 400 watt 6,500 k sakis too! If I was just using the Ushios they IMO would be too blue-----I would use the radiums!
Jim

01-05-2003, 07:10 PM	#1
Chris Lakies Council Join Date: Feb 2002 Location: Utica Mi. Posts: 270	20K Ushio 400 watt MH Has anyone used or seen the 20K Ushio's yet? I was wondering if they are a tad less blue or more blue than Radiums. Any Pictures?? Please post.

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01-06-2003, 12:53 PM	#2
PerryinCA Governor Join Date: Jul 2000 Location: Folsom, CA Posts: 2,103	They are about as blue when run on the same ballast, however, the Ushio seem to have more of a blue coloration as opposed to a bluish-violet to my eye at least. I would say that the two look very similar. When looking at the spectral signature, the ushio has a peak at 410, 450, 547, 575, and the radium has a peak at 450. The Ushio appears to have more actinic light according to some sources. All in all, it really is a close draw. Current research shows that increases in blue light lead to more blue coloration (reflection), so the radium may be a better bet for coloration. Although, as a standalone, the Ushio may give better growth. It's tough to tell without some good studies... I would say that all together, they are pretty similar lamps. -Perry Sunlight Supply, Inc.

01-06-2003, 12:56 PM	#3
Chris Lakies Council Join Date: Feb 2002 Location: Utica Mi. Posts: 270	Thanks Perry, Chris

01-07-2003, 05:26 PM	#4
Hippopus Tenant Join Date: Aug 2002 Location: Round Rock, Texas Posts: 74	I have four Ushio 20,000k 400 watt lights on my tank and I really like them!!! They are alittle more blue than the radiums. I am comparing my Ushios against a friend who just install 400 watt Radiums. Now he is using the PFO HQI ballast and I use PFO regulator ballast. I also use 2 400 watt 6,500 k sakis too! If I was just using the Ushios they IMO would be too blue-----I would use the radiums! Jim

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