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Old 05/26/2017, 10:00 AM   #1176
jda
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Do you have a kill-a-watt where you can measure wall wattage with one versus two? This could prove the above, which I also think is accurate.


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Old 05/26/2017, 10:20 AM   #1177
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Originally Posted by karimwassef View Post
It can probably drive one bulb at a higher voltage/power than when running two. Use a dedicated ballast for each.
I know what your saying. But isn't there actually two ballast in the box? Is it because it is firing them both up at the same time? Or would that make no difference?


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Old 05/26/2017, 10:29 AM   #1178
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Quote:
Originally Posted by jda View Post
Do you have a kill-a-watt where you can measure wall wattage with one versus two? This could prove the above, which I also think is accurate.
I don't have that. I have a multi meter..but not sure how to use it correctly


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Old 05/26/2017, 12:16 PM   #1179
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I know what your saying. But isn't there actually two ballast in the box? Is it because it is firing them both up at the same time? Or would that make no difference?
Most likely there aren't two ballasts.

While I haven't taken them apart, I have done that with other power supplies and ballasts. Duals are usually based on a single powertrain with multiple secondary turns off the main transformer. While that means that the secondary circuitry is dedicated to each output, the primary circuit is common.

When you use it in dual mode, you're pushing the primary to its combined peak output. Unless they oversized the primary side to truly accomodate double the power, running in dual mode will generate less output per output.


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Old 05/26/2017, 01:37 PM   #1180
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Quote:
Originally Posted by karimwassef View Post
Most likely there aren't two ballasts.

While I haven't taken them apart, I have done that with other power supplies and ballasts. Duals are usually based on a single powertrain with multiple secondary turns off the main transformer. While that means that the secondary circuitry is dedicated to each output, the primary circuit is common.

When you use it in dual mode, you're pushing the primary to its combined peak output. Unless they oversized the primary side to truly accomodate double the power, running in dual mode will generate less output per output.
OH. I get it. I guess I was thinking of the old magnetic style


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Old 05/26/2017, 03:12 PM   #1181
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Less output per output ... I need a nap. Language skills diminishing


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Old 05/26/2017, 03:30 PM   #1182
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Less output per output ... I need a nap. Language skills diminishing
So an electronic MH ballast splits the power equally electronically while a Magnetic is just a single "shot" of electric coming out per bulb... correct? Now I know why people sometimes say the old magnetic ballasts can drive the bulbs better


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Old 05/26/2017, 05:42 PM   #1183
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no no.. duals split the power while dedicated provide consistent output.

Dedicated electronic ballasts are superior to the magnetic ballasts. They're more efficient, run cooler and can maintain the voltage better, even with line variances.

I would not advocate for magnetic ballasts. IMO, they overdrive the bulbs and make them burn out faster. They also generate more heat to the immediate area.


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Old 05/26/2017, 09:50 PM   #1184
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Hmm
So your saying even a magnetic dual ballast is splitting the power ? Years ago I had a dual magnetic and from what I remember there were two ballasts in the aluminum box


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Old 05/26/2017, 11:51 PM   #1185
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I don't know how the magnetic dual ballasts are designed. They could be split or combined.

Here's what I'm saying (to be clear) - IME

Electronic is better than magnetic.
Dedicated single ballasts are better than duals.


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Old 05/27/2017, 07:19 AM   #1186
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Thank
I learned something that I didn't know
So now I may look for a second 175 ballast


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Old 05/27/2017, 09:27 AM   #1187
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The only that I have ever owned - PFO dual M80 - were two separate ballasts in a single box.

Electronic is not always better than magnetic. If they bulbs are designed for Magnetic, especially HQI and Radiums, then they run better off of Magnetic ballasts. Some 10K bulbs will do significantly better off of M58. Some don't care. It matters.


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Old 08/18/2017, 07:10 AM   #1188
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Quote:
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The only that I have ever owned - PFO dual M80 - were two separate ballasts in a single box.

Electronic is not always better than magnetic. If they bulbs are designed for Magnetic, especially HQI and Radiums, then they run better off of Magnetic ballasts. Some 10K bulbs will do significantly better off of M58. Some don't care. It matters.
I'm setting up a new system with old equiptment right now. I have a PFO duel 250 (it has 2 transformers in one big box). for SPS, could you give me any SE lamp reccomendations?


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Old 08/18/2017, 08:56 AM   #1189
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20K Radium. It is made to be driven on those ballasts. All other bulbs will be overdriven, but some do OK and some will cut the life substantially.


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Old 08/28/2017, 04:02 PM   #1190
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I have two questions. Question 1 can a Galaxy electronic ballast for a DE bulb? It outputs 4 amps so I think it can but I haven't been able to find a firm answer. Question 2 on the ballast itself it states don't unplug the lamp cords while it is plugged in. It is a dual 250 ballast and it is going over a 40 breeder so I only need the one lamp if I protect the other female socket that is not in use with some sort of insulating cover would that be okay?

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Old 11/25/2017, 12:55 PM   #1191
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Cabo sun Mini

Hello,
Does anyone have par distribution plots for the cabo sun mini or know what the spread is like.
From the BRS video on metal halides, the cabo sun the spread is almost perfectly even at 18" depth.

Just wondering if the Cabo Sun mini is the same except with a less spread, which will be fine since the normal cabo sun can light very wide tanks by the looks of the BRS video.

I am wanting to light a 24x24x12 frag tank.


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Old 11/25/2017, 05:00 PM   #1192
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I just purchased three of the Reef Brite MH/XHO Se pendants and ballasts from BRS , 250 watt. I ordered three of their twin arc 14k bulbs as well. Any general thoughts on this? I was debating 14k vs 20k twin arcs... I thought the 20k might be too blue.

I'm pretty darn excited.... very glad to move on from led and to see the real long shimmer of halides.


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Old 12/06/2017, 05:55 PM   #1193
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Would a Giesemann Infinity 2x150w, 4x54w be enough for a 4x2x2 SPS tank?


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Old 12/06/2017, 05:57 PM   #1194
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Yes. Bulbs are a bit limited in 150W double ended, but the best-of-breed 14K Phoenix are hard to beat and mostly people like them.


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Old 12/11/2017, 01:04 PM   #1195
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