Iv been yousing a protertype lamp now for a wile putting in through vereasd tests its the new gamekeepers 150 with a bigger 36w led over the 120 with 27w its a good beam like 120 but give 800 meter beam 4000 lumens with the added bones of bigger batterys giving 2 hours of consent yous with easy 4 hours or more lamp time.I think this lamp is more for lads that want to see big big distance who's dose this appeal to on here???