coloration of this bulb By acalderon on 1/14/2015
acalderon would recommend this product to a friend
coloration of this bulb is very good for corale maintain backward sps
Great Bulb By Collin on 6/7/2013
Collin would recommend this product to a friend
These bulbs are not that much more than many of the others out there and the corals love them.
Extremely Blue By Brigette on 5/29/2013
Brigette would recommend this product to a friend
I had used "blue" and "purple" T5's before switching to Halides and this bulb gives off the most intense, blue light I've seen. It's working well.
Great bulb By Ray on 4/22/2013
Ray would recommend this product to a friend
I ordered 1 radium to go with the 2 I already have and shipping was fast and it was wrapped very good thank
excellent By rhino56 on 4/4/2013
rhino56 would recommend this product to a friend
This replaced a ushio 20k 400 watt bulb, The ushio is not a bad bulb at all, but this has a lot more brightness to it, completely beautiful color to it. I wont need any other bulbs except this now.
1000w 20K Radium By Calvin415 on 3/11/2013
Calvin415 wouldn't recommend this product to a friend
Wow, this is supposed to be a 1000w bulb??? We were forced to replace our Helios 20k bulbs as they have been discontinued, but excited to find the Radium makes a 1000 bulb! That excitement was quickly extinguished once they fired up... These things are no where near as bright as the Helios we just replaced. Good color, but no where near the brightness I would expect from a 1000w bulb. :( Disappointed not only by the lack of light, but since they were twice the price of a Helios, it makes it sting even more.
This bulb is worth every penny! By John on 9/8/2012
John would recommend this product to a friend
Used this to replace another 250w bulb and it's night and day difference. The corals are all more colorful and growing much better the before. The blue tint is exactly what I was looking for.
Best color bulbs you can get! By Matt on 7/4/2012
Matt would recommend this product to a friend
At least when run on proper HQI ballasts, these give off about 270 watts of the most beautiful 20,000K light I've seen - can't beat it. On plain electronic or other magnetic ballasts these bulbs (150w DE or 250w SE) may be under-driven and give off a much more blue cast - too blue to most people's eyes.
Best Bulbs By Scott on 2/24/2012
Scott would recommend this product to a friend
I have tried many other 20k and there are by far the best color I have gotten out of my corals and still a fast growth rate. Awesome bulbs.
Very Satisfied By Don on 9/28/2011
Don would recommend this product to a friend
I love the color of these bulbs. I have 4 over a 96" x 36" x 30" mixed reef. Love taht I don't have to spend extra $ on actinic supplement lighting. Some opinions may vary, as lighting & colors is very much pesonal preference. Great deal and easy transaction here at BRS.