Walrus said:
I mostly visit Mendips ATM but I also see a fair few mines (with quite large chambers) - I was really wondering if there was much difference between light-types when used in a slate mine, for example, where the rock colours are quite dark - basically which type of light would allow me to see better (if there is much of a difference) or even if a coloured filter might help.
In that case I'd say simply go for the brightest light you are prepared to carry.
Something like an FX5 will have an incredible beam for distance stuff. Although i have no experience with them, oldhams still have quite a loyal following.
I would also say that filters couldnt possibly help, they will only dim your light. If you want to see a long way in big chambers i think you simply need the brightest thing you can possibly carry/afford.
What are other people that you cave/explore mines with using ?
Perhaps you need two setups, using whichever is most suitable for the trip.
(1) Great big powerful halogen "searchlight" for big caves/mines (almost certainly with big battery on belt)
(2) Small LED system with helmet mounted battery for tight stuff.
I think overall brightness will win over any discussion about whether it's LED based or not. If it's bloody bright, you are going to have no problems seeing things.
What do you currently use ?