MH 250W SE Halide bulb help !!

albano1402

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I have been running into issues selecting a metal halide 250w SE mogul bulb for my reef tank. I had changed from LED's back to MH due to coloration issues on my SPS.

Here are my tank details:
120 gal 30 inch deep tank
Pair of 250w HQI M80 Hamilton ballast
Pair of Lumenbrite reflectors

I initially wanted to do 20k Radium bulbs since my primary goal was coloration. Don't get me wrong, growth was important too, but not as important as getting my SPS to color up again.

I had purchased Radiums some bulb issues with them not starting up all the time on Icecap ballasts. I have read about burn in time on new bulbs and firing issues on non-m80 ballasts, so I figured just go and purchase M80 ballasts and I should have a good pairing of bulb/ballasts. I purchased the bulbs from a LRS and they were able to get the bulbs replaced. In the meantime, they gave me an XM 10K or 15K bulb as a loaner until my new radiums came in. When I first put the XM bulb in, I immediately noticed two things:

1. It was way yellow for my tastes.
2. It was super bright. -(I liked the brightness, but not the yellow color as much)

So in that time, I got the new Radium bulbs in and once I put on the M80 ballasts, they worked and then stopped working. I did put one Radium on one side to compare the brightness to the XM and the Radium on the M80 ballast. The Radium was nowhere near the brightness of the XM. It was not very bright at all.

Note: XM's where in for a week and growth was noticeable.

After a few days, the Radium bulbs stopped working. I got completely frustrated with the fact I was on my 4th bulbs of Radium and had bulb issues. I attribute it to bulb issues since the XM worked on all the ballast just fine-(m80 and icecap).

I was happy with the 20K color and the SPS started to color up nicely over that time, but once they went out again, I was forced to order new bulbs and put the XM's back in.

I ordered Ushiro 20K bulbs from BRS. I got the bulbs in the mail and one was broken. BRS was out of additional bulbs and agreed to refund. (thanks BRS for awesome customer service)

I put the one Ushiro 20K bulb in and noticed it was nowhere near the brightness of the XM. It was not very bright at all like the Radium.

The one thing I noticed was in th3 3 weeks of the XM bulb being in was the growth on the XM's are very noticeable in a short period of time the first time I had them in for a week. When the MH's are on, the sps kind look like crap, but I supplement with LED's for my blue after the MH's go out and the color pop is incredible after the MH's are off.

Here is what I noticed:

Coloration on sps although didn't appear as great with the XM bulb on, did in fact happen while getting good growth and was noticeable when LED's where on alone.

I run MH's while I am gone at work and LED in the evening for viewing. After seeing the growth from the lower kelvin, I was possibly leaning towards doing an iswaki 6500k to get more growth if the coloration will still be there when I view with LED's. I was excited about the recent growth.

I want a bulb that is going to be brighter than the Radium or Ushiro 20k on the M80's.
I don't want to keep purchasing bulbs until I find the right one if I can avoid it.

Finally to my question:

For folks that have used iswaki 6500k, was growth much more noticeable than a 10k/14k bulb and was the coloration when viewed under blue spectrum lighting still colorful/present or was it washed out overall?

Based on my above findings, is there a bulb that will give good growth, be brighter than the radium, and still give good coloration on an m80 ballast?

What bulbs other than 250w Radium SE have folks had that were bright, good growth, and overall good coloration?

Just looking for advice from this respected community.
 
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No personal experience but I've heard good things about the Hamilton brand being real close in color to the Radiums.
I ran the radiums on Hamilton M80 ballasts with no issues, but they are known to not have the highest PAR.
Pheonix 14k are a similar looking color but I believe they are DE only now.
 
Radiums run on a m80 ballast are known to put out very good par, esp for a 20k bulb. If your looking for the best overall bulb to run its the radium, esp on the m80 ballast.
 
The Radium had great color. I realize that the "brightness" of a bulb does not always equal par output, but the Radium seemed very dim. It was almost 1/2 the light level of the XM bulb, so when I put both Radium on, the tank didn't seem very bright. It almost looked more like it was dusk rather than daylight on.

If 20k bulbs are not that bright at 250w, then I am thinking that I either need to move to 400W bulb/ballasts,(which is financially out of the budget right now), move to a lower kelvin bulb 10k/14k if I want a brighter appearance tank, or settle for a dimmer looking tank with a 250w Radium bulb.

Has anyone noticed the Radium or 20K bulbs being dimmer overall than lower kelvin bulbs? I would think on an M80 ballast, most bulbs would be brighter since they are being overdriven a bit, but that is not the case on the radium 20k or the ushiro 20k bulbs.
 
Radiums run on a m80 ballast are known to put out very good par, esp for a 20k bulb. If your looking for the best overall bulb to run its the radium, esp on the m80 ballast.
Its a great bulb on the m80, no doubt, but other bulbs do have higher PAR. It's more like a 14-18k in color. I'm currently running a phoenix 14k on my nano and it's really close in color.
 
Looks can be deceiving, which is the case here I believe. The 20k is blue which will always appear to be dimmer than the 10k bulb because it's white.

Maybe try a different ballast. I run radiums on my galaxy hqi electronic ballasts and they are very bright and a nice crisp blue, almost white.
 
Looks can be deceiving, which is the case here I believe. The 20k is blue which will always appear to be dimmer than the 10k bulb because it's white.

Maybe try a different ballast. I run radiums on my galaxy hqi electronic ballasts and they are very bright and a nice crisp blue, almost white.

I have tried at least 2 ballasts. I have Icecap's that worked and fired up the bulbs. It was dim, so I went out and purchased brand new M80 ballasts directly from Hamilton to ensure they are new and free of any issues. I figured the higher output reported from these ballasts would net a brighter bulb. In fairness, it did seem brighter than the Icecap, but not much.

I think I might just add t5's back into the supplementation. Currently I am using (3) AI Sol Blues and a Reefbrite VHO for my actinic, but have the output turned down to not fry anything in an attempt to get the tank brighter.
 
Here's Sanjay's tests that show the Radium is right around the middle in PAR.
http://reefkeeping.com/issues/2007-04/jb/index.php
Yep, I read this too and this was part of the research in looking for a bulb. Since I was not having an issue with coloration, overall sps health, or growth, I was satisfied with potential PAR contribution to the tank. Having the Radium's on the M80, I figure I have the best I can there on a bulb/ballast pairing. I was wanting more pop. I might just let the Radium's hold on the tank for a while and see if I just need to let my eyes adjust to the brightness difference between the two bulbs. I might be making more out of this the more I think of it.
 
I personally love Radiums on M80 ballast. If you are still having issues firing the bulbs check your cord length. I found that if I had it long I had issues compared to making them as short as possible.
 
I had real problems with radium 20k on electronic ballests. Have them on a magnetic m80and they run great!
 
Years ago I was running XM 10K, then switched to XM 15K & even Hamilton 14K. The original XM 10K was nice crisp white, but they must have changed something cause the next set was very yellow. Thats when i switched over to the XM 15, growth was good, but not as good as 10K. The Hamilton 14K were the nicest color, but dimmer than both XM. I also ran VHO actinics to suplement.

Before switching to LEDs I started using PlusRite bulbs. 2 bulbs were around $35 shipped. They were nice, but not as nice as the XM 15K & Hamilton 14K. Just couldn't see spending the extra $150+ per year.

Did you only try the XM 10K? Maybe the XM 15K would be nicer. Finding the right bulb with MH can be frustrating. That's what I love about dimmable LEDs the most.
 

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