Sunday, July 13, 2014

User Guide: How to Install Lighting EVER LED Recessed Downlight

What's LE recessed downlights?
A recessed light (also called downlight, pot light, can light) is a light fixture. you need to cut hole in the ceiling or under cabinet to install it, and the light is downward direction (that's why people call it downlight).


Where to use LE recessed lighting?

It is a true replacement for Halogen lamp. LE downlight includes directional lamp that contain reflectors to narrow the light, and with a spot beam (45 degree) angle. It's ideal for residential (home furnishing lighting, interiro accent lighting) and commercial lighting (jewelry shop, shopping mall, stores, hotels, fashion, office, exhibit lighting, museum lighting, etc.)

1W Cree LED Downlight, Daylight White
1W Cree LED Downlight, Daylight White



How to install LE downlight?
It's important to know how to install the light fittings or fixtures. If you are not a pro, you could refer to the easy-to-understand guide to install LE recessed lights:

Monday, May 12, 2014

Common Light Bulbs Shapes

Light bulb shapes describe the general physical characteristics of the light bulb. LED light bulbs vary in shape from tube shaped bulbs to funnel or pear shaped light bulbs.
  • Omnidirectional: A, BT, P, PS, S, T
  • Decorative: B, BA, C, CA, DC, F, G
  • Directional: BR, ER, K, MR, PAR, R 


PAR lamps: generally have a flat face and come in many sizes, from PAR16-PAR64. The numbers behind the "PAR" (this rule applies to all light bulbs, all bulbs are named by taking a letter(s)-numbers-optional letter format, though the last letter is optional) stand for the diameter of the bulb measured in increments of 1/8 of an inch. For example, a PAR16 means the bulb is 16 eighths of an inch in diameter, which works out to two inches in diameter. PAR style LED bulbs are ideal for a number of applications, from outdoor lights above your garage to track lights in your favorite museum.

Dimmable PAR20 9W LED bulb, more info at this page

R/BR: These two lamps are very similar to each other in terms of shape and application. The "R" stands for "reflector", while the "BR" stands for "bulged reflector". and both bulbs have a smooth, frosted face, evenly dispersing the light. These bulbs are typically used for creating warm, soft, even dispersions of light in recessed cans in living rooms and restaurants, but are also used for wall washing and in track lights.
LE 3W R39 LED bulbs warm white, read more


MR: also called multifaceted/mirrored/mini reflectors, are very similar to the PAR and R-type bulbs in terms of lighting applications. And just like the PAR and R lamps, these bulbs come in different sizes (MR8-MR16), and some come with a glass face, a frosted face, or even with no face. These bulbs get their names from the tiny mirrors located inside the face of some bulbs that disperses the light, while others have a smooth face, giving you a controlled beam of light. Look for MR bulbs in track lights in homes and department stores, in jewelry or display cases, or in museums highlighting a particular piece.
MR16 4W GU5.3 12V LED bulb from LE



Candle/Candelabra: Candelabra base bulbs come in many shapes and sizes, from bent tip, to torpedo shape, even vintage antique bulbs. These bulbs can either be frosted or clear, and don't put out too much light because the small base size limits the maximum wattage. This is why candelabra base bulbs are perfect for decorative chandeliers in your entryway, wall sconces in hotel hall ways, even in your porch light fixture, just as long as the fixture is sealed.
3W C37 E12 dimmable LED candle bulb from Lighting EVER


A19/A60: This is your standard household bulb and is the easiest bulb to recognize. In fact, when someone says light bulb, this bulb shape probably comes to mind. A19 bulbs are measured the same way as the other types. Instead of measuring the diameter of the bulb, like PAR lamps, the bulb's face is measured at its widest point. So an A19 bulb is 19 eighths of an inch, or 2 3/8 inches at its widest point. A19 bulbs are extremely common bulbs and are used in many applications, from reading lamps, to ceiling fans, and to just about anything you can think of.
10W A19 LED light bulb from Amazon

Thursday, May 8, 2014

Luminous flux and Lumen Education

Know More about Luminous flux and Lumen When Buying Bulbs

Flux is the total quantity of light emitted in all directions. It is measured by placing the light source at the center of an integrating sphere and is relevant for non-directional sources such as A type or when comparing two directional sources with different beam angles.
lighting terms

Monday, April 28, 2014

Things You Need to Consider About Street Lighting

As we all know that street lights are very important at night, for illuminating, decorating or safe living. And as the lights will be on for a long time, then efficient will be a key features, besides, there're other aspects of LED street lights: such as spacing, color, intensity, glare, aesthetics, impact on “dark sky,” controls, energy monitoring, public safety, place making, special events, and impacts on drivers, bicyclists, pedestrians, and the elderly and sight-disabled. (From Pittsburgh LED Street Light Research Project)

Key aspects of street lighting:

1.   Dimensions of night time vision looked at how the human eye sees at night; how glare affects vision; how uniformity of illuminance affects vision; and age-related vision loss.

2.   Considerations of lighting the public right-of-way included aspects of place making and ayfinding such as intensity, color temperature, color changing, and focal points.

3.   Aesthetic evaluations examined materials, facade lighting, luminaire style, and standardization.

4.   Performance considerations included varying viewpoints, illumination levels, glare and light trespass, uniformity, color rendering, ambient light, and safety.

5.   Operational considerations dealt with energy use, monitoring, durability, reliability, and light output.

6.   Political and social issues were addressed, including climate change, light pollution, age-related equity, and spatial equity.

7.   Biological/Public Health Considerations included color temperature and circadian rhythm.


Tips for replacing street lights:

Light Color - Colored light was acceptable for accents but not for general lighting of sidewalks or streets. Light color of the street lighting is to be white, preferably 3,500 Kelvin, but with an adjustable range from 2,800 to 5,000 Kelvin.

Color Rendering Index -  CRI must be 80 or greater.

Light Source - Choose energy saving light sources to reduce the energy bills, and the LED light source should not be visible to drivers, bicyclists or pedestrians unless they are directly under the fixture.

Luminaires or Fixtures - Replace the luminaires to that have reflectors/lenses (produce diffused light downward) to control glare or dark sky impact/intrusion.

Life Time - Buy high quality light and luminaires that have long lifespan.
...

Read more about:
How to choose the light color.
Leaf Shape Invisible Street Light

Tuesday, April 22, 2014

How to remove a broken lamp base from the bulb socket?

When changing a light bulb (for example, replacing a screw based bulb), some people may have difficulty in removing the old lamp if the base is twisted and stuck. So this guideline is to instruct you how to solve this problem. (this actually may post a risk of injury, and you'd better consult an electrician).

Note: Safety glasses and protective gloves should be worn to prevent the risk of electrical shock and laceration from metal or broken glass. Also, don’t forget to check if the switch is off in the first place! This is important, keeping you away from being electrocuted.

Removing a broken lamp base from a cord connected household lamp.

• Unplug the fixture from the wall receptacle.
• Remove the lampshade.
• Utilizing a pair of needle nose pliers approved for electrical use, put the nose of the pliers in the center of the lamp socket base.
• Pull the pliers handles away from each other causing the tip of the needle nose to spread open and press up against the broken screw shell wall. (To get a better grip, electrical tape can be wrapped around each tip of the pliers.)
• Apply only enough pressure to the pliers handles to ensure the tip of the pliers firmly presses up against the screw shell wall. Do not apply too much pressure.
• Rotate the pliers counter clockwise unscrewing the lamp base out from the fixture socket.

Removing a broken lamp base from a hardwired connected household fixture.

• Check to be sure the light switch is off that operates the fixture.
• Shut off the breaker in the circuit breaker panel, or if it is a fuse box, remove the fuse.
• Tag the electrical panel as shut off so no one can accidentally turn the power back on.
• Remove the fixture lens/globe of the fixture.
• With a pair of voltage testers test the socket to be absolutely sure the power has been disconnected.
• Utilizing a pair of needle nose pliers approved for electrical use, put the nose of the pliers in the center of the lamp socket base.
• Pull the pliers handles away from each other causing the tip of the needle nose to spread open and press up against the broken screw shell wall. (To get a better grip, electrical tape can be wrapped around each tip of the pliers.)
• Apply only enough pressure to the pliers handles to ensure the tip of the pliers firmly presses up against the screw shell wall. Do not apply too much pressure.
• Rotate the pliers counter clockwise unscrewing the lamp base out from the fixture socket.