Yes, i do use those bulbs, two of them.
They are in a special light fitment and sit in the horizontal position, the only prob is, after a long time use the bulbs droop? a bit.
I simply simply slacken off the bottom screw put in a packer,
and i am back to normal., maybe due to a large extractor fan built into the reflector to extract heat they halve lasted for a long time.
Sorry to say one of them blew just the other day, i will be cheaper to purchase a whole new system !!!!
Due to a accident in the house i have a ruptured kidney and can hardly walk
so a bulb is the last thing i need to worry about.
While doing a google i found a bulb that stops upward growth, but makes for a bushier growth, gonna try this. Cheers.