Radium - 400watt 20k

[Bubblewood]

Looking for some input on the long term life span on these bulbs. I'm currently using 250watt 20k Ushio bulbs and switching over these Radium's. I'm using a electronic Galaxy ballast. Let's hear what your guys thoughts are.
Thanks!

 

[kannon50]

do not run them with the Luxcore ballasts..... they will not be near 20k at all. As soon as i can afford it i am swapping over to a new ballast brand.

 

[diablomaster9045]

I am using 400w 20k radium on my 104g cube with Lumenarc 250-400 HQI select a watt ballast and they are a smidge bluer than a 14k phoenix. Awesome par output.