400W 20,000k Ushio

[stephane]

they are both blue bulb and not 20 k but people in the industry call them 20k butt no they are not the same bulb and look totaly different inside and outside

I try a radium 20k on a agro ballast beside a hushio 20k on a m59 ballast on my reef they both look very nice

the radium is brighter and less blue but is give less fluorescence to coral

I have to admit I have found the hushio very very nice color even nicer than the radium

for the intensity I found the hushio more dim with the eye but have not tested with any meter

By the way the hushio dont have a blue glass