|
|
|
|
|
#2
08-26-2003, 03:19 PM
|
|||||
|
|||||
The last time I cruised on over to www.ushio.com I did not see any reference to a 20000K bulb made by Ushio. I believe that there isn't one. There IS, however, a blue bulb. They have these coloured halide bulbs and I think they come in red, green. and blue or something like that. I wonder if the blue bulb is the 20000K bulb but it's been given the "20000K" label to try to sell some to us aquarium folk who jump all over products with certain keywords.
Here is the product info http://www.ushio.com/files/Colorlite...eet%200502.pdf Notice that (with the exception of the double ended 150W sized bulb which uses a M81 pulse start ballast) that they use the standard probe start ballasts. This means this could be maybe used on the standard ballasts but I'm kind of thinking that their usefulness is as a supplementation light for aesthetics but not really effective as a coral growout light or anything like that. Just my $0.02 though. At any rate I don't have the info that you're looking for in answer to your specific questions about PAR and whatnot, but I wouldsuspect someone has looked at them. Try perhaps a search on RC and see if you can uncover anything. Let us know if you find anything out.
__________________
-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee! 
|
|
#3
08-26-2003, 03:24 PM
|
|||||
|
|||||
|
I didn't find much on RC... nobody seems to use this bulb.... This is a Ushio 400w blue blub like you said and like radium that are blue bulb also. They run on a standard probe stard M59 ballast. So if the radium blue bulb is good for coral growth why the ushio could not.... I must say that the ushio is a bit bluer than the radium.. I tested both side by side on someone tank. And the ushio wasnt overdriven like the radium are....
|
|
#4
08-26-2003, 03:57 PM
|
|||||
|
|||||
|
Quote:
I think from what I recall they are nothing more than colored glass. I will see if I can find out anything for ya. If you read down they also list a recomended starting voltage, which means you need to put a starter on your ballast also. another thing I have noticed is that they are listed as having a wave length of 465nm so I am trying to find out if this is a Peek value or a average. Steve
__________________
 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*Some strive to be perfect.... I just strive.
|
|
#5
08-26-2003, 06:23 PM
|
|||||
|
|||||
|
Quote:
(  Ok, apparently I really AM as tired as I feel today, what you said is what I really meant. I better go find me some more coffee ...... )I didn't notice the bit about the starters. But thats interesting. Ultimately though I am not really convinced these are good replacements for Radiums I think they're just useful for aesthetics. But nevertheless maybe they're not useless either someone just needs to do a PPFD/PAR analysis or something.
__________________
-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
|
|
#6
08-26-2003, 06:38 PM
|
|||||
|
|||||
|
On which infos are you refering for telling it's just for aesthetic.. why a ushio blue bulb wouldn't be as good as a radium blue bulb the two are the mostly the same a blue bulb not ment for aquarium use ????
the only difference I saw is that the Ushio is a 400w blue bulb on a 400w ballast and the radium is a 385w blue bulb on a 430w ballast so it's burning a little whiter and a little bit more intense since it's overdriven. I really need to find a PPFD/PAR analysis. I think maybe I'll leave an email to Sanjay to see if he as already tested one of those...
|
|
#7
08-26-2003, 07:40 PM
|
|||||
|
|||||
|
The difference is the radium burns that color and the Ushio with the blue glass is just filtered that color. I thought I recalled a real 20k from Ushio, at the time only available overseas somewhere. 2 different Ushio bulbs me thinks!
__________________
Brad
|
Hybrid Mode
