References
- Illuminating Engineering Society of North America. 2000. American Standard Practice for Roadway Lighting, ANSI/IESNA RP-8–2000. IESNA. New York, NY. IESNA.
- Illuminating Engineering Society of North America. 1987. IES Guidelines for Unit Power Density (UPD) for New Roadway Lighting Installations, IESNA LEM-6–1987. New York, NY. IESNA.
- Keith, D. 2000. Roadway Lighting Design for Optimization of UPD, STV and Uplight. J of the IESNA. 29 (No. 2): pp. 15–23
- Keith, D. 2002. Unit Power Density Evaluations of Roadway Lighting Systems. J of the IESNA. 31 (No. 2). pp. 66–77
- California Energy Commission. 1993. Advanced Lighting Guidelines. CEC Publication 400–93-014. Sacramento, CA. CEC.
- New Buildings Institute. 2001. Advanced Lighting Guidelines: 2001 Edition. NBI.