Hangzhou Rui-Bright Electric Co. Ltd.



Q:Do I have to replace LEDs?
A:An LED does not burn out like a standard lamp, so individual diodes do not need to be replaced. Instead, the diodes gradually produce lower output levels over a very long period of time. If one LED fails, it does not produce a complete fixture outage.

Q:How long is 100,000 hours?
A:Based on how long a fixture is illuminated per day, here's what 100,000 works out to: Hours of Operation: 100,000 hours is: 24 hours a day 11.4 years 18 hours per day 14.8 years 12 hours per day 22.8 years 8 hours per day 34.2 years.

Q:Where can LEDs be used?
A:Lighting Matters can supply LED lighting for the following applications: Residential applications:- decorative lights- pendant lights- under or inside cabinets- kitchen splash back lighting- recessed lighting- feature wall lighting- bedroom- bathroom- home theatre / media room- entertainment area- patio / garden Architectural/Commercial:- interior and exterior special effect lighting (eg. Hotel, restaurant, casino, water feature, landmark)- landscape lighting for gardens, parks, pools and spas-wall washers- strip lighting- accent lighting- cove lighting - small spot lighting- path lights- in-ground and underwater lights Industrial:- flood Lighting- high or low bay replacement- task lighting- street lighting Retail display:- refrigerated display case lighting- general merchandise lighting, eg. creating effects and moods based on warm/cold colours- display case lighting Entertainment:- concerts feature effect lighting- concert hall and theatre lighting- tv studios, stage lighting- bars, clubs and restaurant Safety and security:- exit / entry signs- emergency lighting- outdoor areas- parking lots- street and highway lights and signs.

Q:What is SMD or High Power LEDs?
A:High power LEDs utilize the latest LED technology. These are the surface mount type or SMD LEDs. Small as they are, they generate high heat which must be dissipated or moved away from the LED in order for the LED to live the expected life time of 50,000 hours. To do that, most manufacturers have incorporated an aluminum body with fins to increase the total area that the heat can escape to and be dissipated. The higher the operating current, the higher the heat load to be dissipated. That means more fins, or more thin and longer fins are required. In the case of one newly developed design, the LED bulb incorporates water to assist with the dissipation of heat and some have even gone to the extent of having small fans inside the lamp.

Q:What about air temperature & CFLs?
A:CFL bulbs may generally be used where the air temperature is between -20 Centigrade degrees and 50 centigrade degrees. Above 50 centigrade degrees, there may be reduced light output and premature ballast failure. CFLs have a harder time starting below 20 Centigrade degrees, reducing the brightness.

Q:What is a LED?
A:Light Emitting Diodes (LEDs) are solid-state semiconductor devices that convert electrical energy directly into visible light There are two semiconductor materials that a current runs through and where light and heat are generated at the junction.

Q:What wattage should I buy?
A:When buying a compact fluorescent light bulb, choose a wattage that's about one-fourth of what you usually buy. The table below shows some typical wattage conversions for CFLs: • 15-watt incandescent = 3-watt compact fluorescent • 40-watt incandescent = 9-watt compact fluorescent • 60-watt incandescent = 13-watt compact fluorescent • 75-watt incandescent = 18-watt compact fluorescent • 100-watt incandescent = 23-watt compact fluorescent • 120-watt incandescent = 30-watt compact fluorescent.

Q:What’s a Lumen?
A:The lumen (unit: lm) is the SI derived unit of luminous flux, a measure of the total "amount" of visible light emitted by a source. Luminous flux differs from power (radiant flux) in that luminous flux measurements reflect the varying sensitivity of the human eye to different wavelengths of light, while radiant flux measurements indicate the total power of all light emitted, independent of the eye's ability to perceive it. The lumen is defined in relation to the candela as 1 lm = 1 cd•sr A full sphere has a solid angle of 4•π steradians, so a light source that uniformly radiates one candela in all directions has a total luminous flux of 1 cd•4π sr = 4π ≈ 12.57 lumens.

Q:What is a CFL?
A:A compact fluorescent lamp (CFL), also known as a compact fluorescent light bulb or an energy saving light bulb, is a type of lamp designed to fit into roughly the same space as an incandescent lamp, but with the advantages of a fluorescent lamp. Many CFLs can directly replace an existing incandescent lamp, CFL can save more than 80%.  


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