TY  - JOUR
PY  - 2014//
TI  - Design of a highly efficient LED-based bicycle head lamp with additional ground illumination
JO  - Lighting research and technology
A1  - Cai, J.-y.
A1  - Lo, Y.-c.
A1  - Feng, S.-t.
A1  - Sun, C.-c.
SP  - 747
EP  - 753
VL  - 46
IS  - 6
N2  - 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>
LA  - en
SN  - 1477-1535
UR  - http://dx.doi.org/10.1177/1477153513520318
ID  - ref1
ER  -