Any one retrofitted a Vistalite head
...with a triple CREE?
If not any one have any thoughts on fit?
(Yes I did a search but couldn't find anything)
I haven't done it, but you might have trouble dissapating the heat that the LEDs generate in the plastic (I assume) head.
Without knowing the exact head, with a little time and effort it would probably be possible.
As Tim says, dealing with dissipating the heat would be a huge issue, and would probably require some serious modifications and cutting up of the housing.
By the time you buy all the parts you will need, it probably wouldn’t take too much more effort just to make yourself a new housing from scratch.
Not sure if you have the same vistalite head as me but I managed to melt the plastic bits inside testing a halogen bulb on my workbench.