Have a look at the magicshine it says its 900 lumens but tests in america have proved it to be between 400 and 600 lumens i have had most headlights over the years and this is second to none it is more powerfull than the ultra and less than half the price i payed 80 quid but my mate got one off ebay for 60 it is made as a bike light for off roading i get 6 hours on full beam and 8 on half, also the batterys sell for 29.99 and weigh almost nothing as they are lithium ion, they are more like a large mobile phone battery i am investing in a second battery for this winter and putting them on the same belt as they weigh nothing , the only fault i have found with it is that it gets bloody hot in the summer months due to the power it puts out but in winter it just gets warm, i think there is some info on youtube about it , but trust me this is the best headlight i have ever seen for winter fishing i bought it at the start of last winter and know of at least 7 lads from seaham that have bought one after seeing it on the beach.