Anyone with 400W 20K's...

[Doug]

Brad, when I run a Radium/Bluewave pulse start and a Radium/PFO normal ballast, {400w}, side by side, the pulse start is at least 50% brighter, if not more. The Radium on the normal ballast is identical to the 400w 12K Sunburst on the same ballast.

[stephane]

If you want color Radium on agro ballast is simply the best light for SPS I ever seen and try

[stephane]

Just forget I have mine for around 8 month and I tink they are still very good for another 4 month

[Doug]

Hi Stephane. Good to see you posting again. Must be pretty busy.

If I may, any idea why your bulbs are still good and many others on RC are saying theirs are shot after the same amount of time?

[Aquattro]

I've asked Steve to bring his PAR meter by, as I'mhitting 6 months now and we can see how much of a drop they've experienced. I don't think I can notice any change yet, but the meter will tell us for sure.

[stephane]

Hi doug

Sorry I dont have a clue but they are still realy bright and all my coral still grow and show beautiful color but I have not take any measure and dont tink I need to as everyting is find

I have not a deep tank only 24 inch and 6 inch of sand. Also my bulb are 5
inch from the water surface and the bulb are in optimal reflector also I was use them only 8 houre a day and found it is more than enought

Im not the only one to use those bulb more than 8 month I have see a couple of people that goes 12 month before to change whith great succes
so maybe those who swap the bulb after 6 month only swap it because they have been said to do so........just as people have change there salt
only because a couple have sais IO is not good

You know wath I mean????? another reef legend

ps: A lightning engeniring have said to me that we should put a fan direct on hour bulb and ballast to cool them down He said the hight temp is the enemy of those bulb and lower operation bulb will live a lot longuer so I will try it on my next set of radium

see you

[Bryan]

I guess I am in the minority here, but I plan on switching back to 250 watt iwasaki's with heavy actinic supplementation when the Radium bulbs run their life expectancy. I have yet to see any impressive color changes with the bulbs. Most of the SPS corals have changed to a milky brown color, and growth has slowed to a standstill. My mushrooms and zoo's don't seem to respond as well to the light.

I have had the Radiums since Feb and running them on the Son Agro ballasts. I appreciate the fact it can take a long time to see an effect with bulbs, but so far I am not that impressed.

The look of the light is beautiful, but after a while it begins to look artificial in a way.