A. A LED lamp (or LED light bulb) is a solid-state lamp that uses light-emitting diodes (LEDs) as the source of light. LED lamps offer long service life and high energy efficiency.
Q. What is an LED panel light?
A. LED panel lights are a type of lighting fixture designed to replace conventional fluorescent ceiling lights. They are one of best lighting options for indoor settings. This kind of lighting makes use of the latest in LED technology and can be mounted in a T grid ceiling in place of a florescent troffer. They can also be surface mounted or pendant mounted.
Q. What is a T8 LED light tube?
A. An LED light tube as a replacement for a fluorescent tube that includes a string of LEDs assembled on a printed circuit board. The LED circuit board is enclosed within a housing this includes a metallic heat sink with a transparent plastic housing. They closely resemble a florescent tube and fit all T8 fixtures.
Q. What does LED stand for?
A. LED stands for Light Emitting Diode. A diode is a semi-conductor that permits current flow in one direction. When electricity is applied to the diode they release light energy – the ‘light emitting’ part of the name.
Q. What is the difference between an incandescent bulb and LED?
A. Incandescent lights create light by the use of a wire filament. When power is applied, the filament glows and generates heat – which in turn produces light. LEDs create light through a ‘cold process’; when power is applied to semiconductors they’re stimulated by the movement of electrons, this creates photons and the photons are the light that is created.
Q. How bright are LED light bulbs?
A. LED bulbs and LED lighting products are available in varying brightness depending on the specific product. Bulbs range from less than 50 lumens to as much as 1500 lumens. Larger LED products can have tens of thousands of lumens. Lumens are the measure of brightness.
Q. What is a lumen?
A. Lumens are a measurement of light output. With incandescent lighting most people are used to associating brightness with certain wattages (i.e. a 100W bulb is brighter than a 75W bulb), but with LED’s the wattage is really a measurement of the power required to light the bulb and not a measurement of light output. A 60 watt incandescent bulb produces about 800 lumens of light and yet an LED bulb can produce the same amount of light using about 10 watts. It’s the lumens that matter. The less wattage it takes to supply a given amount of light the better and more efficient your lighting is.
Q. How efficient are LED bulbs compared to incandescent bulbs?
A. The efficacy of the newer led light bulbs is more than five times higher than comparable incandescent bulbs and two times higher than florescent. In other words, led light bulbs use less than 20% of the electricity needed to produce the same amount of light with an incandescent bulb and 50% of the energy needed for florescent. And because led bulbs direct a larger percentage of light where it is needed, in many applications they are as much as ten times as effective at lighting areas.
Q. Why do LEDs use such little power?
A. The LED chips that produce the light require very little electricity to create light.
Q. What do “cool white” and “warm white” mean, and what is CCT?
A. The Color Correlated Temperature (CCT) is given in the description of each of our white LED bulbs. Unlike incandescent bulbs LED products has specific colors of white light. The color (CCT) of our white bulbs ranges from a warm yellow white color (2700K) all the way up to a cool blue white color (7000K). By comparison, a typical incandescent bulb has a CCT of 2800K (warm white). A typical halogen is a bit higher, maybe 3500K. Daylight white is 4500K and a cool white fluorescent is 6000K or more.
Q: Are LED bulbs those curly, twisted, pig tail bulbs that stick out of light fittings?
A: No. You are referring to CFL bulbs, and they need to be spiral because that is the way fluorescents need to work. They need a tube of gas that activates and lights up when electricity is introduced.
Q. Why are LED lights more expensive than CFL or Incandescent lamps?
A. LED bulbs cost more initially but they are cheaper in the long run. The initial cost is due to the components required to build them including expensive electronic components and LED chips. In addition they have aluminum heat sinks to increase lifespan. These all add up to create an amazingly efficient but initially expensive product. But while LED Bulbs may cost more initially, they pay for themselves quickly in both cost savings and convenience. The PAR 20 LED light bulb, for example, is designed to last 50,000 hours while a PAR 20 Halogen bulb has a 2,500 lifespan. That’s 20 Halogen bulbs for every LED bulb. Now let’s talk about energy savings; during its lifespan an PAR 20 LED bulb uses just 8 watts compared to the 40 watt Halogen bulb. That difference can save you as much as $1,500.00 in electricity costs over the lifespan of the bulb. Add in the cost of the 19 additional Halogen light bulbs and you get what we mean. As you can see, LED bulbs are much cheaper than Halogen or incandescent bulbs.
Q: Will the LED bulbs have to “warm up” to brightness like other types of energy saving bulbs do?
A: LED bulbs require no warm up like compact florescent bulbs. And repeatedly turning them on and off does not shorten their lifespan.
Q. How long do LED bulbs last?
A. LED bulbs installed in well-designed fixtures have a rated useful life of between 30,000 and 50,000 hours. In a typical household that translates into 27 to 45 years. A typical incandescent lamp lasts about 1,000 hours; a comparable CFL lasts 8,000 to 10,000 hours. Some linear fluorescent lamps can last more than 25,000 hours.
Q. What is the difference between a floodlight (BR) and a spotlight (PAR)? They look similar.
A. Great question. PAR lights are spotlights and produce a narrower beam of light, typically less than 45 degrees wide. Most of the light from a spotlight is concentrated onto a relatively small area producing a bright spot. BR lights are flood lights and produce a wider beam of light, up to 120 degrees, so the light from a floodlight is spread out over a much larger area. Because the light is more concentrated, a spotlight will appear brighter than a floodlight but only within its narrower beam. A spotlight is more suited to illuminating objects and a floodlight is more suited to illuminating areas.
Q: Can LED bulbs be used outside?
A: Yes. Some LED bulbs are designed with waterproof fittings. Others need to be kept in a water tight fixture. Read all instructions and manuals before using an LED bulb outdoors.
Q. Do LED bulbs produce heat?
A. LEDs produce very little heat. The heat noticed is created by the electronic components that control the LED. LEDs produce a fraction of the heat of an incandescent bulb.
Q: What is a heat sink? And why do LED bulbs feel warm?
A: LEDs perform best in cool environments. Heat is the enemy of the electronic components that control the LED. It degrades both the level of light output and the lamp life. To move the heat away from the LED control module, we use what is called a heat sink. They absorb and disperse the heat created by the electronic components, keeping them cooler and increasing the lifespan of the bulb. Heat sinks are commonly made of aluminum for aluminum’s thermally conductive properties.
Q: Are LED bulbs available for every application?
A: For most incandescent, CFL, halogen or T8 bulbs there is an LED replacement. LED bulbs are the perfect retro-fit for your existing light fixtures.
Q: Do LED bulbs contain any heavy metals like Mercury as some other energy saving light bulbs do?
A: No. Unlike Compact Florescent Light bulbs (CFL’s) LED bulbs do not contain mercury or other hazardous metals or chemicals.
Q: How should I dispose of an LED bulb?
A: There are no harmful metals or chemicals in an LED bulb. Over 95% of the bulb is recyclable. Please recycle.
Q. Do LEDs attract insects like conventional bulbs?
A. No they do not. Insects see entirely different spectrums of light and are attracted to ultraviolet light.
Q. Do LED bulbs emit UV and IR like other bulbs?
A. Most LED bulbs produce a “cold” beam that contains only visible light. In other words, no ultraviolet (UV) or infrared (IR) light is emitted. There are several advantages to using a light that only emits electromagnetic radiation in the visible spectrum, as a light without UV or IR will not fade colors, degrade artwork or radiate thermal energy (heat) in the beam. This makes LED lighting an ideal candidate for retail shops, galleries and museums, all of which need lighting with good color rendering and that won’t adversely affect the merchandise or art displays.
Q. Are LEDs affected by extreme conditions?
A. Unlike incandescent and florescent bulbs. LEDs are very durable and geared for harsh environments. LEDs function from -40F to 180F.