In reply to Boulderdash86:
for me winter lighting has lots of factors. high on the lost is compactness, as i like to keep the light both handy and warm in an inner pocket or wrapped around my wrist when in a sleeping bag.
for this the zipka cant be surpassed - but its a bit weak.
glove-friendliness is big too - most torches fail this. petzl is worst i find.
power matters for long walks and route finding. a red light is vital for in the tent (i refuse to share tents with people who dont use them - sleep is a big deal when trips get long).
for all this i find the BD spot rates highest, with a petzl e-lite for tent use when trips get longer.
the icon is a great light but too heavy/bulky except for routes with known massive approaches on expansive ground (big snow slopes etc where knowing whats above is vital).
i tried the myo range and found them fiddly, over designed and unreliable.
have lenser torches for other things and like them, but find the spot the most 'climber specific' and stashable.