{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

lec6 - Key objectives in lighting design Qualifications no...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Key objectives in lighting design ± Qualifications no strong "contrasts" good "color rendering" adequate "light levels" no "disturbing reflections" no direct "glare"
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Radio- and photometric quantities ± Radiometry vs. Photometry absolute (energy) vs. V( λ )-dependent (light) 350 400 450 500 550 600 650 700 750 800 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Wavelength [nm] Relative Efficiency [-] Figure by MIT OCW.
Image of page 2
Radio- and photometric quantities ± Four major quantities flux illuminance intensity luminance Figure by MIT OCW.
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Radio- and photometric quantities ± Flux energy / unit of time φ in Watts [W] vs. lumen [lm]
Image of page 4
Radio- and photometric quantities ± Flux energy / unit of time φ in Watts [W] vs. lumen [lm] 683 lumen/Watt at 555 nm : φ lum [lm] = 683 Σ V( λ ) φ e [W] 75 watts 1055 lumens 70 watts 5600 lumens Incandescence Discharge very different efficacies ! Figures by MIT OCW.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon