Title:
道路灯
Document Type and Number:
Japanese Patent JP6726857
Kind Code:
B2
Abstract:
A street lamp includes a light emitter that is disposed at a height of at least 5 m and at most 15 m above a road and emits white light to illuminate the road. The white light has: a correlated color temperature in a range from 5000 K to 6500 K; a chromaticity deviation in a range from −10 to +10; a scotopic/photopic (S/P) ratio of at least 2.0, the S/P ratio being a ratio of a scotopic luminous flux to a photopic luminous flux; and an average horizontal illuminance of at least 5 lx at an illumination area on the road illuminated with the white light.
Inventors:
Naoko Takei
Makoto Yamada
Toru Suzuki
Makoto Yamada
Toru Suzuki
Application Number:
JP2016112127A
Publication Date:
July 22, 2020
Filing Date:
June 03, 2016
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H05B47/10
Domestic Patent References:
| JP2014032944A | ||||
| JP2012186000A | ||||
| JP2013127853A |
Attorney, Agent or Firm:
Hiromori Arai
Eisaku Teratani
Shinichi Michisaka
Eisaku Teratani
Shinichi Michisaka