Here is hella's own light tester. You get a measurement scale, zoom and light spread diagram. plus an on off switch. results are very suprising, for the supposedly crappiest light ever, my good ole 500s driving beams put up some great numbers according to hella, yes I know they make them, but its comparing hella lights only, not other competitors lights. the 500s get down the road further than most other lights in their line up. Right in line with my experiences with the light, not tested with meters etc, tested with your eyes, the thing that acutally uses the lights output.....made better by the HID system install as well. 500 FFs work great for a wider beam but down get down the road as far. a lot of their pencil beams are long but not wide, the 500, is the perfect combination of both, even as a budget light it kicks ***.
http://www.hella.com/MicroSite/eliver_US-Version/index.html
http://www.hella.com/MicroSite/eliver_US-Version/index.html