Are all VHO Bulbs half transparent?

[ozone]

I have custom made lights that I'm trying to install a VHO retro kit into. I want to mount the end caps sideways, but I discovered the super actinic bulbs I ordered are not fully transparent. The bulbs are 180 degrees transparent and 180 degrees non-transparent/solid white.

Is this normal for VHO Bulbs? Are there 360 degree transparent VHO bulbs?

 

[Jim]

All the VHO's I've purchased are half and half. The non transparent side is the reflector.

 

[ozone]

Thanks Jim. I'll have to find a way to mount the caps so all the light gets reflected towards the tank.