I use a Fenix BT20 which is absolutely superb, but it comes to lights that don't break the bank balance,I saw these recommended a few days ago. http://www.amazon.co.uk/SecurityIng%C2%AE-3800Lm-Headlight-Headlamp-Bicycle/dp/B009QX8B2Q/ref=sr_1_5?ie=UTF8&qid=1385590031&sr=8-5&keywords=cree+xml+t6