Here are some pics of the bike light I've been working on. It has four Cree XR-E leds running at about 400mA using the Fatman boost driver. Since these leds are from the P3 bin it should be up over 300 lumens. Power consumption is about 4.75W. Cree optics are used. With no airflow it gets warm to the touch after 30 minutes or so.
Riding a bike with lots of airflow it could probably get cranked up to 750mA drive current (~500 lumens) without overheating. Machined from a solid block of aluminum. My first attempt at machining.
I'll post some beam shots later. It completely blows away my 15W halogen flood light. It's amazing to get this much light and only drawing 5W.
cheers,
jamieson
The corner got munched when it slipped out of the vice. I plan to countersink all the screws tomorrow.
Riding a bike with lots of airflow it could probably get cranked up to 750mA drive current (~500 lumens) without overheating. Machined from a solid block of aluminum. My first attempt at machining.
I'll post some beam shots later. It completely blows away my 15W halogen flood light. It's amazing to get this much light and only drawing 5W.
cheers,
jamieson
The corner got munched when it slipped out of the vice. I plan to countersink all the screws tomorrow.