Lighting Projects
Most if not all incandescent lights (except for specialty lighting) has been changed out to florescent lighting. Most of the older T12 40w florescent lights has been replaced with newer more efficient T8 32w or even 25w florescent lights. Some of the newest projects have gone to LED lights.
Lighting Comparison Chart | |||||
Lighting Type | Efficacy (lumens/ watt) | Lifetime (hours) | Color Rendition Index (CRI) | Color Temperature (K) | Indoors/ Outdoors |
Incandescent | |||||
Standard "A" bulb | 10–17 | 750–2500 | 98–100 (excellent) | 2700–2800 (warm) | Indoors/ outdoors |
Energy-Saving Incandescent (or Halogen) | 12–22 | 1,000–4,000 | 98–100 (excellent) | 2900–3200 (warm to neutral) | Indoors/ outdoors |
Reflector | 12–19 | 2000–3000 | 98–100 (excellent) | 2800 (warm) | Indoors/ outdoors |
Fluorescent | |||||
Straight tube | 30–110 | 7000–24,000 | 50–90 (fair to good) | 2700–6500 (warm to cold) | Indoors/ outdoors |
Compact fluorescent lamp (CFL) | 50–70 | 10,000 | 65–88 (good) | 2700–6500 (warm to cold) | Indoors/ outdoors |
Circline | 40–50 | 12,000 | Indoors | ||
Light-Emitting Diodes | |||||
Cool White LEDs | 60–>180 | 25,000–100,000 | 70–90 (fair to good) | 5000 (cold) | Indoors/ outdoors |
Warm White LEDs | 27–>180 | 25,000–100,000 | 75–95 (fair to excellent) | 3300 (neutral) | Indoors/ outdoors |
Note: The LED technology is evolving so quickly that just two years ago (2011) the best efficacy was about 80 lumens per watt. Last year (2012) they broke 100 lumens per watt and a recent article (2013) listed top efficacy at 180 lumens per watt.
