LED Lights: Top ten questions about LED lights answered – LED Hut

1. How do LED lights work?

LED (light-emitting diode) light sources work differently to traditional lighting sources, such as incandescent. Incandescent bulbs work with a burning filament at the centre of the bulb that eventually burns out. LEDs derive their light energy from electrons that move within a semiconductor material. When a voltage is applied to the leads these electrons are stimulated to create light-based energy. LEDs aren't just used for lighting either, and can be found across a wide range of electricals. For example, you can now get LED TVs that produce a better picture quality and allow for slimmer designs.

2. Are LED lights safe?

As with any electrical fitting, you need to take obvious precautions during the installation process. If you're re-wiring directly to the mains, then we always advise that you contact a qualified electrician. And, as with any source of light, it's advised you don't stare directly at them, otherwise you'll run the risk of causing damage to your eyes. However, when installed, LEDs are actually safer than older light sources such as incandescent and halogen. This is because they are fitted with heat sinks that dissipate heat away – so you're less likely to burn your fingers upon contact, unlike with traditional lighting sources that are dangerous to touch.

3. Are LED lights dimmable?

Yes they are – but you have to make sure you purchase a

4. Are LED lights cheaper to run?

Yes, LED lights are significantly cheaper to run because they consume less energy. While they'll cost you more up-front, you'll recoup that initial investment in a matter of months, then continue to save every month after.

5. How do LED lights save you money?

There are two key ways in which LED lights save you literally hundreds – if not thousands – during their lifetime. • Cost to run. LEDs use up to 90% less energy than incandescent and halogen light bulbs, which are the most commonly-used light bulbs around. This means that when you make a switch from an older light source to LED, you'll quickly start seeing your energy bills plummet. In fact, you'll make back your initial outlay in a matter of months and continue saving thereafter. It literally pays to switch to LED! • Lifespan. Incandescent and halogen light bulbs are made to last just 2,000 hours. LEDs, in comparison, are made to last up to 25,000 hours. Based on average use, that’s a whopping 15 years of service. So not only will you see those energy bills dwindle, you'll save money on replacements too.

6. What causes LED lights to flicker?

As with any light source, LEDs can flicker – particularly if they haven't been installed properly in the first place. One of the main reasons behind LEDs flickering is the power supply they're receiving. While older light sources require an AC power supply, LED bulbs require a DC power supply. That's why it's so important to have an LED driver that converts your power supply from AC to DC. This will ensure there's a constant supply of power to your LEDs to combat any flickering. Most LED bulbs have the driver built into them, but certain types of LED lighting require a

7. How do LED lights help the environment?

LED's consume very little energy, particularly when compared to halogen and incandescent equivalents. You can replace a 100W incandescent bulb with a 10W LED and still enjoy the same level of light output, while reducing greenhouse gas emissions. Plus, LEDs don’t contain toxic chemicals such as mercury, unlike fluorescent lights that contaminate the environment when disposed of. Finally, LEDs last up to 20-times longer than any other traditional form of lighting, reducing the number of replacements you need and further lowering your impact on the environment.

8. Do LED lights get hot?

You can expect a little bit of warmth radiating from your LED lamp – but a lot less than halogen and incandescent equivalents. This is because LEDs use 90-95% of their energy supply to produce light, while the other 5-10% of energy used produces heat – the opposite being true for older bulbs, which is why you have to careful when changing them.

9. Are LED lights good for growing plants?

They are indeed. You can now get LED hydroponic lamps that help stimulate plant growth by providing the optimum amount of light wavelength and intensity required for different growth phases, but without the inefficiency that comes with CFL and incandescent grow lamps.

10. Are LED lights bad for your eyes?

As with any source of light, we strongly advise that you don’t stare directly at LED lights as they could subsequently cause eye damage. Apart from that, no, they’re not bad for your eyes! If you're ready to make the switch you can find all of our

LED lights have been around for a while but are still relatively new to a lot of people. To help you get started, we've answered ten of the most common questions about LED lighting.LED (light-emitting diode) light sources work differently to traditional lighting sources, such as incandescent. Incandescent bulbs work with a burning filament at the centre of the bulb that eventually burns out. LEDs derive their light energy from electrons that move within a semiconductor material. When a voltage is applied to the leads these electrons are stimulated to create light-based energy. LEDs aren't just used for lighting either, and can be found across a wide range of electricals. For example, you can now get LED TVs that produce a better picture quality and allow for slimmer designs.As with any electrical fitting, you need to take obvious precautions during the installation process. If you're re-wiring directly to the mains, then we always advise that you contact a qualified electrician. And, as with any source of light, it's advised you don't stare directly at them, otherwise you'll run the risk of causing damage to your eyes. However, when installed, LEDs are actually safer than older light sources such as incandescent and halogen. This is because they are fitted with heat sinks that dissipate heat away – so you're less likely to burn your fingers upon contact, unlike with traditional lighting sources that are dangerous to touch.Yes they are – but you have to make sure you purchase a dimmable LED bulb . You can't just dim a standard LED bulb. You also need to make sure you have a compatible dimmer switch. If you're upgrading from incandescent or halogen to LED, it's more than likely you're currently using a leading-edge dimmer, and these aren't compatible with LED. We advise upgrading to a specialised LED dimmer , such as an LED-ready trailing-edge dimmer, that'll deliver the best performance while prolonging the lifespan of the bulb itself.Yes, LED lights are significantly cheaper to run because they consume less energy. While they'll cost you more up-front, you'll recoup that initial investment in a matter of months, then continue to save every month after.There are two key ways in which LED lights save you literally hundreds – if not thousands – during their lifetime. • Cost to run. LEDs use up to 90% less energy than incandescent and halogen light bulbs, which are the most commonly-used light bulbs around. This means that when you make a switch from an older light source to LED, you'll quickly start seeing your energy bills plummet. In fact, you'll make back your initial outlay in a matter of months and continue saving thereafter. It literally pays to switch to LED! • Lifespan. Incandescent and halogen light bulbs are made to last just 2,000 hours. LEDs, in comparison, are made to last up to 25,000 hours. Based on average use, that’s a whopping 15 years of service. So not only will you see those energy bills dwindle, you'll save money on replacements too.As with any light source, LEDs can flicker – particularly if they haven't been installed properly in the first place. One of the main reasons behind LEDs flickering is the power supply they're receiving. While older light sources require an AC power supply, LED bulbs require a DC power supply. That's why it's so important to have an LED driver that converts your power supply from AC to DC. This will ensure there's a constant supply of power to your LEDs to combat any flickering. Most LED bulbs have the driver built into them, but certain types of LED lighting require a separate driver to power them. Simply check before you buy.LED's consume very little energy, particularly when compared to halogen and incandescent equivalents. You can replace a 100W incandescent bulb with a 10W LED and still enjoy the same level of light output, while reducing greenhouse gas emissions. Plus, LEDs don’t contain toxic chemicals such as mercury, unlike fluorescent lights that contaminate the environment when disposed of. Finally, LEDs last up to 20-times longer than any other traditional form of lighting, reducing the number of replacements you need and further lowering your impact on the environment.You can expect a little bit of warmth radiating from your LED lamp – but a lot less than halogen and incandescent equivalents. This is because LEDs use 90-95% of their energy supply to produce light, while the other 5-10% of energy used produces heat – the opposite being true for older bulbs, which is why you have to careful when changing them.They are indeed. You can now get LED hydroponic lamps that help stimulate plant growth by providing the optimum amount of light wavelength and intensity required for different growth phases, but without the inefficiency that comes with CFL and incandescent grow lamps.As with any source of light, we strongly advise that you don’t stare directly at LED lights as they could subsequently cause eye damage. Apart from that, no, they’re not bad for your eyes! If you're ready to make the switch you can find all of our LED lights here

Environment

Are LED Lights Considered Good for the Environment?

Yes, LED lights are better for the environment than traditional light sources as with proper heat management they can last much longer. LEDs deliver the same amount of lumens as traditional luminaires, but with less energy consumption. For example, a 400W HID luminaire can typically be replaced by a 150W LED luminaire and still deliver the same lumens.

Efficiency

Do LED Lights Burn Out?

Yes, all light sources will eventually burn out. However, LED sources typically last much longer than traditional light sources. They usually have a longer L70 rating. For example, a quality LED luminaire will have at least an L70 rating of 50,000 hours, while an HID luminaire may only have a rating between 6,000 to 15,000 hours.

Do LED Light Bulbs Save Money?

Yes, LED lights save money on energy consumption. They produce a higher rate of lumens per watt, meaning they are much more efficient and use less energy to produce the same amount of light.

What Does L70 Rating Mean?

L70 is a means of measuring lumen maintenance.  The L70 refers to the point when an LED lamp source is producing 70% of its initial lumen output.  For example, the RDA NTH-LED20 initial lumen output is 2089, its L70 rating is 100,000 hours.  So at 100,000 hours the luminaire will be producing roughly 1462 lumens.

Why is this rating important when considering a luminaire?

This rating allows you to know how long you can depend on a luminaire to produce an acceptable amount of light.

Concerns

Do LED Lights Produce Heat?

The short answer is yes, LED luminaires produce heat. The long answer is that while LED diodes produce heat, it isn’t where you might think. The heat is generated at the back of the LED chip.  So, the back of the diode gets really hot, but the front/exterior of the luminaire remains cool to the touch.

In order to obtain long life, it is crucial to manage the internal temperature (junction temperature) of LED diodes.  This can be accomplished in a variety of methods, one of the most common being the implementation of heatsinks to pull the heat away from the LED diode and disperse it.

What Color Temperature (CCT) is Best for Your Eyes?

Ideally, the best light for your eyes is that of natural light, which would be around 5000K and higher. Natural light boosts your vitamin D and has a tremendous effect on your circadian rhythm. In the absence of natural light, it is best to design the light to the needs of the space. For example, in an environment such as a doctor’s office or surgical room you would install a luminaire with 5000K or higher CCT for bright blue-white light – something crisp and clean. On the other hand, In a recovery room, you may want to step down to something 3000K to 2700K, that is more calming and cozy.

What luminaire is the right luminaire for my application?

This is all relative.  In order to figure out the right luminaire for the application you have to consider the following:

• Budget

  – What is the budget for this application?

• Rebates

  – Are there rebates available to offset the cost of the initial purchase of materials and labor?

• Time

  – How soon is the project going to start?  When does it need to be completed?

• Usage

  – What is the usage of the given space?  Is it a manufacturing plant, a supermarket, an office space?  If work is being conducted, what type of work, is it a machinist shop where detailed work is being done or is it a warehouse?

• Demographic

  – What is the average age of the people occupying the space?  Is an older demographic that will need more light, brighter light?  Is it a young demographic that will not need as much light and would benefit from a warmer color temperature?

• In some applications, more than one luminaire might be needed to properly illuminate space.

Key Benefits

Are LED Lights Dimmable?

Yes, LED luminaires can be dimmed provided that:

1. The driver controlling the LED is a dimmable driver.

2. You use the right dimmer.

For example, some LED luminaires have a 0-10V dimming driver which would require a 0-10V dimmer.  Others work off of ELV (Electronic Low Voltage), in this application you would use an ELV dimmer.

1. You size the dimmer to the application. LED luminaires have a much larger inrush current (amount of power it takes to turn something on) than traditional light sources. In order to compensate for that initial inrush current, you have to upsize your dimmer.  

Can I use LED lights outdoors?

Yes, LED luminaires can be used in outdoor application ratings provided they have the appropriate IP or UL rating.  For outdoor applications, the appropriate IP rating could be anything from IP44 to IP68.  IP65 rating should cover most outdoor applications.  When using UL as a guideline for outdoor use, look for a damp (think lighting under canopies, soffits, etc.) or wet location rating.  When in doubt, contact a professional for help selecting the right luminaire for the job.

Should I change my light bulbs to LED?

Yes, the benefits to switching to LED from traditional light sources have been addressed ad nauseam over the past 15 years. LEDs are more environmentally friendly, and typically have a longer lifespan than traditional light sources. They also save on energy and labor costs, and are easier to control than some traditional light sources, like HIDs.