About LEDs

All About LED Replacement Light Bulbs

Today everyone feels the pain of high energy costs and depleting natural resources. By using LED Light Bulbs there is finally something we can all do to help.

Changing incandescent and fluorescent light bulbs to high power LED light bulbs can save you as much as 90% of the energy being wasted today, putting money in your pocket and more green in the world.

LED Lighting Today

LED bulbs started out as tiny blips on the dashboards of scientific equipment that basically went on and off and not much more. For years technicians struggled to get more power from single LED chips and to cluster those together to create a brighter light output. While working to solve the problems of color temperature and rendition, lumens output (brightness), and put it all together into a familiar package (similar to existing bulbs), energy costs continued to climb.

The LED bulbs presented here at EarthlightLED.com are the finest available and will give extended life while meeting or exceeding expectations.

Today every modern LED bulb is a work of scientific art with technology previously unavailable embedded into the LED and its assembly.

LED Color Temperature and Rendition

Never before has color been so important. LED bulbs are sorted by color temperature and the resulting color rendition can be expected to match the index ratings.

Warm Color Temperature 2,000 - 3,500 Kelvin Rating

Lower values mean warmer color with a light that appears golden and warm when shown on white or light colored objects. This is closest to the light from a typical lower wattage incandescent bulb

Cool Color Temperature 4,000 - 6,000 Kelvin Rating

These mid-range values give a neutral output that is softer with less blue or white tones while diminishing the golden look of lower values.

Cold Color Temperature 6,500 - 8,500 Kelvin Rating

This higher end of the spectrum can be seen as sharp and crisp with blue tones when shown on white or light colored objects.


Energy Usage

The miniscule amount of energy used by LED Bulbs, roughly 10% of that used by an incandescent bulb of similar light output, is a miracle of modern science. When used in a variety of applications the amount of energy savings multiplies and the money saved becomes substantial.

LED BULB WATTAGE REPLACES

INCANDESCENT WATTAGE

TOTAL ENERGY SAVINGS

3 WATTS

30 WATTS

27 WATTS

4 WATTS

40 WATTS

36 WATTS

5 WATTS

50 WATTS

45 WATTS

6 WATTS

60 WATTS

54 WATTS

7 WATTS

70 WATTS

63 WATTS

8 WATTS

80 WATTS

72 WATTS

9 WATTS

90 WATTS

81 WATTS

LED BULB WATTAGE REPLACES

INCANDESCENT WATTAGE

TOTAL ENERGY SAVINGS

10 WATTS

100 WATTS

90 WATTS

11 WATTS

110 WATTS

99 WATTS

12 WATTS

120 WATTS

108 WATTS

13 WATTS

130 WATTS

117 WATTS

15 WATTS

150 WATTS

135 WATTS

18 WATTS

180 WATTS

162 WATTS

20 WATTS

200 WATTS

180 WATTS

 

Energy savings equates to real dollar savings when local kilowatt/hour rates are applied and multiple LED Bulbs are used. In fact most LED Bulbs pay for themselves and begin saving money in only a few months of usage.

Beam Angle/ Beam Spread

The beam angle (beam spread) of an LED lamp is the angle at which light is dispersed. A typical halogen bulb will have a beam angle of some 38 degrees. Within limits it doesn't make much difference if the beam angles are slightly different – but larger variations can be very effective. Beam angles of 30-60-90 degrees do make a substantial difference in the dispersion of light.

Using a narrow beam angle or spread, under 20 degrees will create a noticeable “hotspot’ on the floor and so a minimum 30 degree spread is advised for most applications.

Narrow beam angles are good for highlighting particular objects, such as within display cases, and also where light distribution needs to be restricted.

Example of a 30° Beam Angle

 





 

 

Example of a 60° Beam Angle

 

 

 

 

For most applications a beam angle in the 30 - 60 degree range will be fine given a ceiling height of around 8 feet.  A wider spread of 60 degrees will allow more area to receive light and a 90 degree angle allows even greater area to be covered.

Bulb Life

LED Bulbs offer the longest possible service life of any lighting option available today. With LED Bulbs typically burning for more than 50,000 hours they far outlast incandescent and compact fluorescents.

LED Bulb Average Life

Incandescent Bulb Average Life

Compact Fluor. Average Life

50,000 hours

1,200-2,000 hours

3,000 – 5,000 hours

 

PAR Lamps Defined

Incandescent and cfl (compact fluorescent) PAR bulbs use a "PAR"-abolic reflector within the bulb, hence the name. The number following PAR determines the size of the bulb at the front in 1/8s inch. A PAR 20 lamp is 20/8 or 2-1/2" across the face. A PAR 30 is 30/8 or 3-3/4" across and a PAR 38 is 4-3/4" across the front of the bulb.

LED replacement Par lamps look like old fashioned Par lamps but do not have reflectors since LEDs are broadcasting all of the light outward from the bulb and do not need to reflect wasted energy (light).