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.
Great color! By Alex on 8/11/2011
Alex would recommend this product to a friend
These Radium 250 20k are the best i have ever used!
Best halide bulb By dakotasreef on 1/29/2011
dakotasreef would recommend this product to a friend
Hands down the best bulb! You will get to see colors in your corals you did not know existed. These bulbs put out quite a bit of par also.
Best Bulb out there By Greg on 1/16/2011
Greg would recommend this product to a friend
I have been running these bulbs for a few years and love the color. I would highly recommend.
Gotta have 'em! By Bill on 1/3/2011
Bill would recommend this product to a friend
These bulbs are absolutely amazing! No more cheap 20k bulbs for me! I have a 6' 125 gallon mixed reef and I used to have to run 2 6' VHO Super actinics and 1 6' VHO 454 bulb along with my cheap 20k's to get nice coloration. With two Radiums I get beautiful color with no need to enhance with VHO's! Just the savings on electricity alone justifies the expense, and BRS has the best pricing I've found for these!
Great Color By Dan W on 12/30/2010
Dan W would recommend this product to a friend
These bulbs have great blue color that really make greens, reds, and, blues pop. They are a little pricey but worth the cost. I will use these bulbs again.
Very Good Bulb By Brian on 12/22/2010
Brian would recommend this product to a friend
I use 2 MH fixtures over 160 tank. These bulbs really make the colors on my corals pop compared to previous 140000 Ushio bulbs. I have now turn off my Atinic T5's when the MH are on and get great color. They start real blue but after burned that settles down.
Great bulb, excellent color By James on 11/23/2010
James would recommend this product to a friend
These are by far the best bulb I have ever used, the growth I get is great and it has just the right amount of blue in it to make corals "pop" with no supplemental lighting. They fire every time on my lumatek dimmable ballasts.
excellent!! By Wayne on 11/10/2010
Wayne would recommend this product to a friend
Top notch bulb! Beautiful color rendition. Quality all the way.
400W Radium Best reef bulb I have used By Joshua on 3/19/2010
Joshua would recommend this product to a friend
I have been using this bulb now for 6 month. I am extremely happy with it all the colors from my corals pop like never before. I will never go back to a cheaper bulb again u get what you pay for.