lent a lamp of my mate yesterday, he had a blitz and a broken striker, and he was on about buying a new striker so i said to him you can just swop the heads over. Then he asked me, well if everything is the same on the inside, the only differnce being the reflective area, then why does the battery run out quicker on the blitz. I couldnt answer him, not have much experience with the blitz and only using them with 37 ah battery, they have never ran while ive been there. Can anyone answer this, its got me puzzled.