Another option is to have a scout around the house for something fairly opaque that fits over the head of your torch and make a diffuser.
A guy on one of the torch forums found a 35mm film canister case fit straight on his Zebralight SC600 so i asked around and found a few to use.
Works great plus i don't have to faff about taking different batteries/fuel etc.
I use a bit of cord wrapped around the base with a clip on the end, i can then hand it upside down in the tent or camping area to give a really good useful light.
Only thing i would change given the chance is to have bought the slightly warmer tint to give a less washed out effect on colours.
Just makes reading a little less stressful on the eyes.
To be honest as i have a thing about torches i tend to create excuses to take different torches out.
So i bought a Zebralight H502 headlamp in a lot warmer tint
As it weighs next to nothing even with a battery and headband attached i tend to just throw that in and use that.
It doesn't give out much heat, but then i'm not a fan of having anything hot or burning in my tent.