Design of a highly efficient LED-based bicycle head lamp with additional ground illumination

J. Y. Cai; Y. C. Lo; S. T. Feng; C. C. Sun

doi:10.1177/1477153513520318

Design of a highly efficient LED-based bicycle head lamp with additional ground illumination

J. Y. Cai, Y. C. Lo, S. T. Feng, C. C. Sun

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

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 2.5 W, while the novel design offers a maximum illuminance of 30 lux at the HV point, and illuminances larger than 3 lux across the first 7 m 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.

Original language	English
Pages (from-to)	747-753
Number of pages	7
Journal	Lighting Research and Technology
Volume	46
Issue number	6
DOIs	https://doi.org/10.1177/1477153513520318
State	Published - 20 Dec 2014

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title = "Design of a highly efficient LED-based bicycle head lamp with additional ground illumination",

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 2.5 W, while the novel design offers a maximum illuminance of 30 lux at the HV point, and illuminances larger than 3 lux across the first 7 m 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.",

author = "Cai, {J. Y.} and Lo, {Y. C.} and Feng, {S. T.} and Sun, {C. C.}",

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AU - Cai, J. Y.

AU - Lo, Y. C.

AU - Feng, S. T.

AU - Sun, C. C.

N1 - Publisher Copyright: © The Chartered Institution of Building Services Engineers 2014.

PY - 2014/12/20

Y1 - 2014/12/20

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 2.5 W, while the novel design offers a maximum illuminance of 30 lux at the HV point, and illuminances larger than 3 lux across the first 7 m 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.

AB - 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 2.5 W, while the novel design offers a maximum illuminance of 30 lux at the HV point, and illuminances larger than 3 lux across the first 7 m 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.

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Design of a highly efficient LED-based bicycle head lamp with additional ground illumination

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