A luminaire designed for tunnel lighting is proposed, featuring the ability to adjust the ratio between counter-beam and pro-beam lighting based on different contexts. This allows the luminaire to achieve the optimal lighting mode for the conditions within the tunnel at that time. When both side LEDs are activated, it operates in symmetric lighting mode. When a single-side LED is activated, it switches to either counter-beam or pro-beam lighting mode. The advantage of this luminaire lies in the use of a single freeform secondary lens and LEDs, making installation simpler. It ensures driver safety and is more energy-efficient than traditional tunnel lights.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.