While browsing the Internet I came upon this page where they talk about silicon liquid filled led light bulbs and was wondering if this technology could be used to cool and transfer the heat away from high power leds like the XHP 70, what do you all think?
Article
Silicon liquid filled bulb
Its been discussed
Surely the liquid would have an effect on beam profile in the configuration for flashlights. And I bet that a small fan could shed more heat than the liquid. Seems the liquid is only as effective as the outer shells ability to dissipate the heat.
Also don’t know why they have included it in the 40w equivalent versions. Doesn’t seem necessary.
U mean diving lights? 
Sounds like a great idea, now they just need to add a little coffee creamer.
I purchased the original Switch Led bulbs. First off they are very heavy. Second they have terrible pwm. Aside from those problems they work fine.
I actually have a liquid cooled flashlight. And it’s an easy mod, anyone can do it.
Note: You must be alive for this to work. If your heart’s not beating, the cooling liquid’s not flowing. Zombies and vampires will need to seek out a different solution.
I have big hands and larger cooling area than average. Does this mean I can pump more amps to the emitter 
Hahaha blood cooled
I am planning on filling the cavity between driver and led shelf and ledshelf and reflector of a SRK with oil for cooling.
Will be a winter project
You could DIY a liquid cooler just get a bottle of water and poor it over the light hahaha!
If you want to be really fancy get a hydration backpack and use that!
The problem I can foresee is heat expansion, the air bubble in that globe is there to stop the glass breaking due to heat expansion of the oil, air is easy to compress, oil not so much :student:
The bubble is ok for a light where it will not be seen or if seen at least be static, can you imagine a flashlight with a bubble wandering around the reflector :confounded:
Thinking out loud here, maybe use a small soft rubber ball (sealed) in the driver cavity to absorb the expansion pressure and make sure there is a flow path to inside the reflector :question:
Cheers David
Zombies likely won’t be able to install batteries in the first place, and i suspect vampires can get all the blood they want, though they may have to use it as an external cooling fluid.