when I buy the light many year ago it work great and be plenty bright . I take to strap it onto the handlebars of my bicycle -lrb- with a pad to prevent damage -rrb- for commute home at night from work . I really like the quick forty five minute recharge cycle and I have two battery so be easy to change out . no other bike light I have find at any price come close to that quick charge and simplicity . anyway ... the bulb eventually go after lot of use and I go look for new one . at my local tool supply I find they and head for the counter . nine DOLLARS ! ! ! ! -lrb- for two bulb ; now ten plus -rrb- . that be stupid I exclaim ! for twelve volt flash light bulb . I can get the same thing at the local mom and pop hardware store for less than a dollar each ; dollar sixty nine top . five dollar each from Dewalt what a mark up ! Thievery ! etc. , etc. , etc. , etc. , ok I be sing a different tune now . I just `` invest '' in two genuine dewalt after several year of use the hardware store one . partly because the cheep one be get hard to find and because I remember the light be plenty bright back when new and have not seem that way for a while now . even allow for the darken that happen to the glass on the bulb over time I put in the new bulb and run it for a charge worth . quite a difference . the light out put be whiter than the basic cheep bulb , the spot on the road be larger for the same pitch , it actually seem to get brighter on the second use even though the battery be lower annnnnnd it run longer than with the cheep bulb for the same charge . I can say that because the run time be within a minute or less for each commute period . I guess I be back with Dewalt bulb for the difference they make .