Saturday, 18 June 2011

Types of Lighting

You'll find that you have several options to consider when selecting what type of lighting you should use in your home.

When selecting an efficient lighting, it's a good idea to understand basic terms and principles of lighting. Also, it helps to explore your lighting options for indoors or outdoors if you haven't already. This will help narrow your selection.

Types of lighting include:

* Incandescent lighting
* Fluorescent lighting
* High-intensity discharge lighting
* LED lighting (light-emitting diodes)
* Low-pressure sodium lighting
* Outdoor solar lighting



You can use the chart below to compare the different types of lighting.

Lighting Comparison Chart
Lighting Type Efficacy
(lumens/
watt)
Lifetime
(hours)
Color Rendition Index
(CRI)
Color Temperature
(K)
Indoors/
OutdoRR

Incandescent
Standard "A" bulb 10–17 750–2500 98–100 (excellent) 2700–2800 (warm) Indoors/
outdoors
Tungsten halogen 12–22 2000–4000 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

High-Intensity Discharge
Mercury vapor 25–60 16,000–24,000 50 (poor to fair) 3200–7000 (warm to cold) Outdoors
Metal halide 70–115 5000–20,000 70 (fair) 3700 (cold) Indoors/
outdoors
High-pressure sodium 50–140 16,000–24,000 25 (poor) 2100 (warm) Outdoors

Light-Emitting Diodes
Cool White LEDs 60–92 35,000–50,000 70–90 (fair to good) 5000 (cold) Indoors/
outdoors
Warm White LEDs 27–54 35,000–50,000 70–90 (fair to good) 3300 (neutral) Indoors/
outdoors
Low-Pressure Sodium 60–150 12,000–18,000 -44 (very poor) Outdoors

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