LED FAQ

Q. What does LED stand for?
LED stands for “Light Emitting Diode”. Light Emitting Diodes, as the name states - are diodes. A diode is a semi-conductor device that permits current flow in one direction. Semiconductor diodes are a junction of two materials. One material has a surplus of positive charge (holes),
 and the other a surplus of negative charge (electrons). When one applies a forward voltage, the electrons and holes are brought together. They combine and release
 light energy - the 'light emitting' part of the name.
Q. Is an LED a bulb?
LEDs do appear to be bulbs, but in fact are not. LEDs are tiny semiconductors encapsulated in plastic which protects their components and helps to focus the light.
Q. What is the difference between an incandescent bulb and LED?
Incandescent creates light by the use of a filament. When power is applied, the filament glows and generates heat - which in turn produces light. LEDs are just the opposite. LEDs create light through a 'cold process'. When power is applied to semiconductors (usually gallium, asenic
and phosphorous), they're stimulated by the movement of electrons, this creating photons. Photons are the light that is visibly seen by humans.
Q. Do LEDs have a wire filament?
No, LEDs operate using entirely different components. LEDs are diodes - they only allow power to move in one direction. The anode (+) is where the current comes in and the cathode (-) is where the current goes out, much like the positive and negative terminals of a battery. Incandescent bulbs project light in every direction (omni-directional) as opposed to LED lights which project light in specified directions (such as 20, 50 and 120 degrees) due to their package design and layout.
Q. Why do LEDs use such little power?
LEDs do not use a filament where a conductor is heated and light is created. Filament based lighting consumes more power than the light produced. LEDs produce very
 little amounts of heat and do not use filaments making them far more efficient in consumption and output.
Q. Do LEDs produce heat?
LEDs produce very little amounts of heat. The heat noticed in some instances is due to on board components and other factors of the circuit. In comparison to
incandescent, LEDs produce a fraction of the heat. If LEDs are hot to the touch, they are being overpowered due to improper circuitry.  
Q. Can LEDs be damaged if hooked up backwards?
Yes, they can. LEDs are diodes and only allow power to pass in one direction. To ensure that you will get the most life out of our LED devices, we add additional
circuits to prevent this from occurring in both AC and DC applications.
Q. Are LEDs affected by extreme conditions?
LEDs are geared for harsh environments. LEDs function from -40F to 180F. There is no delay or required "warm up time" for LEDs to function.
Q. Do LEDs attract insects?
No they do not. Insects see entirely different spectrums of light and are attracted to ultraviolet light. A side note - flowers create "nectar guides", invisible to the human eye and ultraviolet light attracts insects to flowers for reproductive purposes. This is not to say that all bugs
aren't attracted to LED lights, but most can't see the light that LEDs produce.
Q. How long do LEDs last?
LEDs are rated by manufacturers to operate under normal conditions for approximately 10 years or 100,000 hours of continuous use. As LEDs get older, they tend to
dim and fade but aren't susceptible to blinking like incandescent or fluorescents.
Q. LEDs are more expensive than other lighting options. Why?
LEDs can operate as standalone devices, but when grouped or clustered they require additional steps to operate properly. LEDs need proper components such as a
circuit board, driving components and some cases and housings to endure the elements. LED circuits can be designed rapidly, but to ensure that they operate correctly
and for long periods of time they require testing.
Q. Are LED's inherently directional?
No. One way to boost the luminous intensity spec (usually given in candelas of millicandelas) is to focus the beam more tightly. The same light flux, focused into a tighter
beam, will give a higher luminous intensity spec. So indicator LEDs with 10 degree beam width are popular in part because they have higher specs compared to the same
LED packaged to have a 30 or 70 degree beam width. It's more common to see illumination-grade LEDs rated in lumens, which doesn't take into account the focusing of the beam. Arrays built from narrowly focused LEDs will be narrowly focused; arrays built from
 other beam distributions will exhibit the beam distribution of their component LEDs. Narrow-beam LEDs and arrays can lose apparent impact when viewed slightly off-axis.
Q. How do you get more light out of an LED?
LEDs are made by a process that deposits the junction materials on a substrate material. One of the limitations of LEDs is that imperfections in the material deposited on
the substrate reduce the efficiency. Improvements in the manufacturing process have given us brighter LEDs, as have new junction materials.  To a certain extent, you can
 also make the junction larger to get more light. But you can't extend that very far, mainly due to those imperfections. Their accumulated effect prevents a junction from
growing much bigger than a square millimeter. So we won't likely see larger LED junctions without some advance in materials science to overcome that limitation. Since
a single LED is a relatively low power device (by comparison with other light sources), constructing LED arrays is attractive.
Q. Can LEDs be dimmed?
It's useful to think of an LED as a current-driven device. The light output is proportional to the drive current over a decent range. Things go a bit odd at the bottom end of the current range, where the LED may
flicker or change color. So dimming by reductions in forward current isn't the most useful technique. Instead, pulse width modulation presents a technique to safely dim
an LED from 0 100% of its' nominal brightness. By pulsing the LED with current, and varying the duty cycle of the current waveform, the LED rapidly transitions between
on and off, and the relative times spent give the impression of being dimmed. Pulse width modulators are electronic controlling devices that also add significant cost to the
unit or design.

 
Frequently Asked Questions
In this section we have listed questions commonly asked about our services and our products. We hope if you do have a question our Frequently Asked Questions will answer any query,
otherwise please do not hesitate to contact us on
 
Why choose LED?
LED Light bulbs are 3 times brighter than traditional Christmas lights; they use 90% less power making LEDs more energy efficient towards the environment. Also LEDs bulbs last longer, 100,000
hours longer than your standard Christmas light bulb.
 
Can I track my order?
Yes, any order you make with Festive Lights can be tracked through our delivery service providers. For all UK and European delivery destinations visit the DPD website, and for all America and
 the Rest of the World delivery destinations visit the FedEx Worldwide website and select Track.
 
How do I edit my Festive Lights account details?
This information can be acessed at the bottom of any page under Edit Account Details.
 
How do I return a product to Festive Lights?
Festive Lights Ltd will refund or exchange any unwanted items on your order before or up to 7 days following the day of delivery if you return the product(s) to us unopened and in it’s original packaging, complete with any free gifts or accessories. For more information visit our Refunds & Returns.
 
Who can help and advise me?
At Festive Lights we have a dedicated team of specialists who are experienced, clued up and keen to help your choose the best product for you, from your ideas we can advice you which
items work best and technical information you should be aware about when purchasing lighting. There are 4 ways to contact us:
Phone: +86 755 36524525
Email:
info@simaoled.com
Fax: +86 755 23035303
 
Do you deliver to destinations worldwide?
Due to the high demand and popularity of our products worldwide we can deliver easily to you any where in the world. For all your delivery information visit our Delivery page
 
Do you offer a next day delivery service?
Festive Lights offers a next day delivery to UK mainland addresses and some worldwide destinations. For more information about this visit our Delivery page
 
How do I receive free shipping with my order?
Festive Lights are pleased to announce that we now offer Free standard UK delivery on all orders placed on our website. For more information about this visit our Delivery page
 
Can I keep Lights plugged in outside?
Lights designed for the outdoors come fitted with quality moulded outdoor plugs making them weatherproof. Make sure you are using a proper outdoor socket. Alternatively if you don’t have one of
these you can use Festive Lights' latest product Weatherproof Box designed for connecting all your outside connections safely inside a seal tight box, perfect all year around.
 
WEEE Regulations
The Waste Electrical and Electronic Equipment (WEEE) Directive is now UK law. The legislation aims to make producers pay for the collection, treatment and recovery of waste electrical equipment.
The regulations also mean that suppliers of equipment like high street shops and internet retailers must allow consumers to return their waste equipment free of charge.

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