View Full Version : MH Bulbs

03-24-2008, 09:23 PM
Double or single end??

03-24-2008, 09:29 PM

03-24-2008, 09:30 PM
And why?

03-24-2008, 09:32 PM
Depends on your needs. Love the SE 1000w we have on my Dad's but if you don't need to use a luminarc III, I also love DE, more par, smaller bulb, less room required (smaller reflector). My $.02

03-24-2008, 09:35 PM
single ended for the wide array of bulb choices. Doubles are cool cause you can overdrive them at a higher wattage, but a Lot of people aredoing that with single ends now as well.
honestly wattage has something to do with your choice as well certain spectrums are good for 400w and the same bulb IN a 250 might suck

03-24-2008, 10:47 PM
what about 2 Lumenarc III Mini Stealth DE reflectors with a dual 400w PFO ballast and coralvue 400w 20k bulbs.... I call that the solaris replacement... :D

03-25-2008, 06:45 AM
Single. Ill never go back to double ended.

03-25-2008, 02:31 PM
Single. Ill never go back to double ended.

Why not, Russ?

03-25-2008, 02:52 PM
I 've got single and double and the double's are way brighter but have alot less actinic. Maybe just the brand not really sure

03-25-2008, 03:14 PM
Why not, Russ?

Limited bulb selection. I mean good bulb selection. They have plenty of crappy ones. Has to be shielded. Salt creeps forms on the shield so it has to be cleaned frequently. Glass shield absorbs up to 20% of the par. If the shield breaks, it will fry your corals and fishes due to the UV. Pain in the arse to get the bulb in. A much bigger pain to get the bulb out. Over rated in my opinion. And yes, for those who do not know me, I have used DE lamps for a long time. Much happier with SE. This is just my opinion tho and Im not saying it wont work because it does.

03-25-2008, 05:56 PM
I agree with all of Russ' points, getting those bastards in and out sucks, I've had the clips break and then the bulb never fits right after that.
Lots of people have killed lots of corals cause the glass broke and they leaked out major UV into the tank.

03-25-2008, 06:01 PM
I do like my 250W DE bulbs. I do not like the inhuman effort required to semi-dismantle my HQI fixture to get the darn bulbs in there !!! Cleaning the filter glass, when the light are off so the glass is not red-hot, is a must on a regular basis. Keeping the fixture high enough from the water to not get splashed and shatter is also something to keep in mind (no different though than if you were using SE bulbs). Note: you really should use filter glass between your DE bulbs and your tank - lest your fry your livestock with UV - try not to be tempted to just take out the glass !

Yes, all these things do reduce the PAR reaching your precious corals. For now, I will continue with my DE bulbs - we shall see how long for. Pheonix HQI 14K DE rock !!! One of these days I will have to try some 20K's to see how they look !!!


03-26-2008, 05:29 PM
I agree with Russ. I will never use DE again. It may have higher par but you lost 20% due to the shield, DE bulb last 6-8 months, Cost more, etc....