@article{ref1,
title="Design of a highly efficient LED-based bicycle head lamp with additional ground illumination",
journal="Lighting research and technology",
year="2014",
author="Cai, J.-y. and Lo, Y.-c. and Feng, S.-t. and Sun, C.-c.",
volume="46",
number="6",
pages="747-753",
abstract="A novel design of phosphor-converted, white light emitting diode-based bicycle head lamp producing sufficient illuminance on the target to meet the K-mark regulations and additional illumination on the ground is proposed and demonstrated. The phosphor-converted, white light emitting diode has a power demand of 2.5W, while the novel design offers a maximum illuminance of 30lux at the HV point, and illuminances larger than 3lux across the first 7m on the ground. The optical utilisation factor for the target illumination is 30% and for the ground is 44%. It means that around 74% of the luminous flux emitted by the phosphor-converted, white, light emitting diodes is utilised. This novel and highly efficient bicycle head lamp provides safer illumination for bicycle riders.<p /><p>Language: en</p>",
language="en",
issn="1477-1535",
doi="10.1177/1477153513520318",
url="http://dx.doi.org/10.1177/1477153513520318"
}