I bought a light from Jessops ( £60, 35watt - which I got for £38 ) that fixes to the shoe, it uses an external battery pack so it doesnt waste the cams juice up.

I'm not too happy with it though, because it takes 12 hours to charge and then lasts 5 to 10 minutes. When it works its great for the first 5 minutes while its bright, then its very dim until it just turns off after 10 minutes.

This sound about right? Or have I got a dodgy battery? Could anyone reccommend a better light for around £40?