Incandescent bulbs create light by passing electricity through a metal filament until it becomes so hot that it glows. Incandescent bulbs release 90% of their energy as heat.
Halogen lamps as opposed to common bulbs are filled with halogen. They give substantially more light, up to 100% more than a regular bulb. They also save 30% on electricity, reduce carbon dioxide emissions by 30% and have twice the operating life of a regular bulb.
Energy saving bulbs and compact fluorescents
In a CFL, an electric current is driven through a tube containing gases. This reaction produces ultraviolet light that gets transformed into visible light by the fluorescent coating (called phosphor) on the inside of the tube. A CFL releases about 80% of its energy as heat. Energy saving bulbs and compact fluorescents use 80% less energy than a regular bulb and last up to 15 times longer. It remains eco-friendly throughout its entire lifecycle thanks to reduced energy consumption and waste production.
Energy saving bulbs contain a small amount of mercury and should therefore be properly disposed of at a recycling centre.
LED lighting products use light emitting diodes to produce light very efficiently. The movement of electrons through a semiconductor material illuminates the tiny light sources we call LEDs. A small amount of heat is released backwards, into a heat sink, in a well-designed product; LEDs are basically cool to the touch. LED stands for Light Emitting Diode. A LED is a semiconductor which produces light within a narrow spectrum.
LEDs have very low energy consumption, emit little heat and have an average lifetime of up to 50,000 hours. A LED can unlike other light sources, change colour.
Some useful lighting terms
Watts (W) are a measure of power consumption but give no information about the amount of light emitted by the light source. A 100 watt bulb and 20 watt energy saving bulb give off about the same amount of light, but consume different amounts of power.
Lumen (W) measures how much light a radiating light produces, but gives no information about energy consumption.
Candela (cd) discloses how much light from a directed light source with a certain dispersion angle reaches a defined point.
Lux is the most common measurement of light intensity and states the amount of luminous flux reaching a specific area from a light source.
Kelvin (K) elates to the colour temperature of the light. For example a common bulb has a colour temperature of 2700° Kelvin.
Colour temperature: Hue:
2700 K Incandescent light
3000 K Warm white
4000 K Cold white
6000 K Daylight
Energy efficiency rating for bulbs and fluorescent tubes
A = More efficient
G = Less efficient
Letter designations in text or figures indicate a bulb s energy efficiency rating on a scale from A to G
|25W = 3W LEDs||40W = 7W LEDs||75W = 10W LEDs||100W = 15W LEDs|
|20W = 2-3W LEDs||35W = 4W LEDs||50W = 7W LEDs|
|75W = 30W LEDs||150W = 60W LEDs||250W = 120W LEDs||400W = 180W LEDs|
The data for the theoretical data, depending on the actual application environment and design of LED, there may be some errors.
LED Lamps How long is 50,000 hours?
Based on how long a fixture is illuminated per day, here’s what 50,000 works out to: Hours of Operation: 50,000 hours is:
24 hours a day 5.7 years
18 hours per day 7.4 years
12 hours per day 11.4 years
8 hours per day 17.1 years
LED is more energy efficient, and lasts longer
The benefits of LED are compelling from an economic perspective:
|Commercial Technology||Typical Efficacy (L/W)||Typical Useable Lifetime Hours|
|Incandescent||10 – 18||750 – 2 000|
|Halogen||15 – 20||3 000 – 4 000|
|CFL||35 – 60||8 000 – 10 000|
|LED (white)||25 – 44||35 000 – 50 000|
|Metal Halide||50 – 90||7 500 – 20 000|
The benefits of LED are also compelling from the perspective of how many Watts are consumed to produce a similar level of light output for any typical lighting application. Compare the Watts consumed for typical lighting applications:
|Typical Commercial Lighting Application||White LED (W)||White Neon (W)||Incan. (W)||CFL (W)||Metal Halide (W)|
|Sign (1 foot)||3||7|
|Step or path||5||20||9|
* Average for T8 linear flourescent
LED is not just the brightest, but also longest lasting and best.
LED is a truly superior technology for all kinds of general illumination applications. LED lighting is brighter, more energy efficient and cost-effective compared to traditional incandescent and fluorescent lighting. Especially in locations where lights are required for significant hours per day, the long term savings are compelling. Traditional light bulbs have to be replaced every 1,000 – 2,000 hours for incandescent bulbs, or every 4,000 – 6,000 hours for compact fluorescents. LED lights can last 50,000 hours or more. While the initial cost of an LED powered fixture may be higher today, the longer term cost of ownership can be much lower without the requirement to replace burned out light bulbs.
The energy savings and environmental benefits make LED an even more compelling choice.
Replacing a 65W incandescent lamp with a 15W LED retrofit fixture:
- * Saves 160 kWh per year
- * Reduces 300 lbs. of CO2
- * Reduces 1.4 lbs. of sulfur dioxide
- * Reduces 0.8 lbs. of nitrogen oxide