Do 250W double ended bulbs mean that its 500W?

[Mouse]

Sorry dumb question.

So do double ended 250W bulbs mean that it is litterally 2 x 250W in each bulb?????

 

[Chucker]

In a word, "no."

 

[Mouse]

So 250W single and 250W double both have the same output?

 

[MattM]

Double-Ended just means that there are electrical contacts on both ends:

 

[Mouse]

Ahhh, thanks Matt.

Yea, and you Chucker.

 

[pez]

The double ended lamps generally have higher PAR. So you generally get more output from them over mogul base lamps.

-T

 

[Mouse]

Oh, right so they are better.

I was just looking a Emm B's site and i saw that she had 3 250's over a 150gallon tank. I was wanting to put 3 250W double ended Aqualine 10k HQI's over a 200G - L6" x H 25' x w 25'.

Just wondering if it's going to be sufficient for SPS. But theni suppose this question is a little premature seen as it will be ages till i get the £2000 or so needed for the unit.

 

[ujohnk]

Hi Mouse,
Why dont you get a Giesemam or Arcadia 3x250w half the price.Or if you go on to the German mail order sites the Aqualine units are a lot cheaper.(i dont know if you can use them in the Uk though?)
John

 

[Mouse]

Hi Nathan,

long time, hows the new tank.

 

[Mouse]

oh UjohnK, well the Arcadia lamps suck, big time. And the Guiessemann lights are about the same price once you bought the computer and moonlight bulbs and timers to meet the spec of the Aqualine ones.

Plus i have heard so many people say the Aqualine bulbs are good.

 

[Anonymous]

The double ended lamps generally have higher PAR. So you generally get more output from them over mogul base lamps.

I'm not so sure. I was talking with Richard Harker a couple of weeks back and he pointed out to me something I missed. In Sanjay's old 250w MH bulb article, the 10000K double ended bulb scored the highest PAR value. But if you look at Sanjay's material, it comes out this bulb was tested without a glass shield (required, in actual operation, and almost certain to have a noticeable impact on PAR numbers) and with a reflector (which most of the other tested bulbs did not have recourse to).

[ February 19, 2002: Message edited by: cjdevito ]</p>

 

[Nathan1]

I believe that it's the double ended bulbs that are a tad more efficient than standard single ended.

-Nathan

 

[pete]

Read the latest test in reefs 2002. The 150 hqi actually put out more par than some 400watt mogul bulbs. This was with the glass shield. hqi in comparable watts put out more than mogul bulbs, even iwasaki.

 

[pez]

Becareful now; that test was run with a reflector and the others were not. The author notes this in the article. Thus the "skewed" results.

-Tom

 

[Anonymous]

The author notes this in the article

Not saying otherwise, just saying I missed that, Richard pointed it out to me, and I take it as food for thought.

 

[Mouse]

Its just that Deltec bought out these cheap <read hellishly expensive but in comparison to a normal chiller> chillers called the Eco Seris. I was thinking with one of these i could go for 400W bulbs but if the HQI's are so good i might go with those still.

Thanks for the replys.