darkknightlight
Enlightened
You can't run a 3854H for two hours nonstop on 6AA or two 18650. That's the huge difference when running six full-sized D batteries in a 6D light.
I understand that, and I did not mean to claim otherwise; I apologize if I was vague. I was more saying that as a response to the 10 minute deformation comment. I've run the 3854H for 18ish minutes straight without any damage to the light. For me, that is a plus in a 6D light; after 18 minutes I don't have to recharge my batteries, just let the light rest for a few minutes.
The bulbs that I would consider running for a long period of time in a 6D require a bipin socket like the KIU, and therefore would minimize the heat deformation dangers. Again, I was merely suggesting the 3854H as a place to start. I apologize if my suggestion led to a damaged bulb tower!