{"id":13440,"date":"2018-04-24T12:55:46","date_gmt":"2018-04-24T04:55:46","guid":{"rendered":"https:\/\/www.recommend.my\/blog\/?p=13440"},"modified":"2024-09-29T09:57:53","modified_gmt":"2024-09-29T01:57:53","slug":"will-you-actually-save-more-with-led-lights","status":"publish","type":"post","link":"https:\/\/www.recommend.my\/blog\/will-you-actually-save-more-with-led-lights\/","title":{"rendered":"Will you actually save more with LED lights?"},"content":{"rendered":"

Every few months, a bulb will go out in one of the rooms in my house.<\/p>\n

And every few months, I am faced with the same question: should I replace the existing bulb, or switch it out to an equivalent LED bulb?<\/p>\n

The same question also pops up when doing a new house renovation: should I move to 100% LED bulbs?<\/p>\n

Yes, we’ve all heard about the benefits of LED bulbs. They last longer than CFL energy saver bulbs, and they use less energy.<\/p>\n

And since the prices of LED bulbs keep getting cheaper, there doesn’t seem to be a reason not to switch anymore.<\/p>\n

But, in order to get a clearer idea of the real savings from LED lights, let’s dig deeper.<\/p>\n

While you're here...<\/div>
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 <\/p>\n

The difference between incandescent, halogen, fluorescent and LED light bulbs<\/h2>\n

\"incandescent<\/p>\n

Incandescent lights<\/span>\u00a0work when electricity produces heat through filaments. The filaments become hot enough that they emit white light. This process however, is inefficient because 90% of the electricity is wasted through heat. Incandescent lights also have shorter lifespans and are highly fragile. As a result, they are slowly being phased out, partly in response to Malaysian government directives<\/a><\/span>.<\/p>\n

\"halogen<\/p>\n

Halogen lights<\/span>\u00a0work the same as incandescent lights, but use a different gas and coating to improve its lifespan and efficiency. However, they also burn much hotter than incandescents.<\/p>\n

\"circular<\/p>\n

Fluorescent lights<\/span>\u00a0meanwhile, produce UV light by passing electric current through a combination of argon gas and mercury vapour. The UV hits the sides of the glass which is coated with phosphor, and this creates visible light. Common fluorescent tubes come in T8 (1 inch diameter) tubes and T5 (\u215d inch diameter) tubes, in 4 feet and 2 feet lengths, as well as circular tubes (shown in image).<\/p>\n

\"energy<\/p>\n

Compact fluorescent lights<\/span>, or CFLs are similar to fluorescent tubes, but are coiled to fit common incandescent light sockets. They also use 70% lesser energy than incandescents<\/a><\/span>, making them more efficient. However, fluorescents contain mercury, which is harmful to people and the environment.<\/p>\n

\"LED<\/p>\n

LED (light-emitting diode)<\/span>\u00a0light bulbs are made of semiconductors that produce light when electricity passes through it. LEDs have longer lifespans, are more durable and consume the least amount of energy. Also, unlike fluorescents and incandescents, LEDs do not produce infrared radiation and contain heat sinks to help them remove unwanted heat<\/a><\/span>, thus making them cooler to touch.<\/p>\n

 <\/p>\n

How to choose your lightbulb<\/h2>\n

There are three main questions you need to ask when it comes to choosing your bulbs:<\/p>\n

    \n
  1. What brightness do you need? (measured in lumens)<\/li>\n
  2. What colour temperature do you prefer? (measured in Kelvin)<\/li>\n
  3. What type of socket do you use, e.g. E27, E14, etc<\/li>\n<\/ol>\n

     <\/p>\n

    Choosing a light bulb brightness<\/span><\/p>\n

    When it comes to choosing the brightness of your lights, the first thing to know is that watts do not determine brightness<\/span>, lumens does<\/a><\/span>. A lumen is a unit of measuring brightness. The higher the lumen number, the brighter your lights are.<\/p>\n

    Watts<\/span>\u00a0is basically how much energy a light needs to use to produce light. A higher watts number means a higher consumption of energy. You can’t rely on wattage as a measure of brightness because different bulbs consume different amounts of energy. For example, if you wanted a bulb with a brightness of 1100 lumens, you could get a 13W LED, an 18W CFL bulb, or a 53W halogen bulb.<\/p>\n

    Ideally, you should go for a light bulb that produces the brightest light yet consumes the least watts.<\/p>\n

    \"brightness<\/p>\n

    Above: Different wattage of bulbs by brightness. Source: <\/span>ledwatcher.com<\/a><\/span>\u00a0<\/span><\/p>\n

     <\/p>\n

    Choosing a colour temperature<\/span><\/p>\n

    Next is the colour of the light. Do you want a “warm white” or a “cool daylight”? Light colour is expressed as the colour temperature, which is measured in Kelvin<\/a><\/span>\u00a0(K). The scale of Kelvin are from 2,700 to about 7,000K. Lights with lower Kelvin give out a \u201cwarm\u201d, orangey glow, while lights that have higher Kelvin emit bright, white light and are considered as \u201ccool\u201d lights.<\/p>\n

    Normally, you would choose cool daylight bulbs for reading and other tasks. And, warm lighting as accent of ambient lights. Learn more about choosing the right type of lighting for every room<\/a><\/span>.<\/p>\n

    \"light<\/p>\n

    Above: Colour temperature chart for light bulbs. Source: <\/span>lightbulbs-direct.com<\/a><\/span><\/p>\n

     <\/p>\n

    Choosing the type of socket<\/span><\/p>\n

    Finally, when replacing light bulbs, you need to know the type of base socket it uses. The most common socket in Malaysia is the E27 socket, which is a screw-in type. The “E” means “Edison screw”, and the “27” means that the socket is 27mm in diameter.<\/p>\n

    Another common socket is E14. This is, you guessed it, 14mm in diameter.<\/p>\n

    Some older lights will fit a B22 bayonet bulb, which has two short pins sticking out from either side.<\/p>\n

    \"Common<\/a><\/h2>\n

    Above: Common light bulb socket types used in Malaysian homes<\/span><\/p>\n

     <\/p>\n

    The cost of lighting your home<\/h2>\n

    Everyone wants to lower their monthly electricity bill. And while the big energy guzzlers are usually air-conditioners, water heaters, kettles and irons, your lights also contribute about 20% of your energy costs<\/a><\/span>.<\/p>\n

    Replacing old incandescent light bulbs with energy efficient LEDs is one way to lower your lighting costs, since they consume far lesser energy.<\/p>\n

    But as you will see below, there are more factors at play than just the energy consumption.<\/p>\n

     <\/p>\n

    Calculating cost savings by switching to LED<\/h2>\n

    To calculate the actual savings of LEDs, we need to consider the hardware cost as well as the running cost.<\/p>\n

     <\/p>\n

    Estimating hardware costs<\/span><\/p>\n

    The average lifespan of LEDs is over 25,000 hours. That’s about 2.85 years, compared to just 1200 hours (50 days) for an incandescent bulb, and 8000 hours for CFLs*.<\/p>\n

    In other words, in the time it takes for an LED to fail, you would have replaced your incandescent bulb over 20 times, or your CFL bulbs over 3 times.<\/p>\n

    However, LEDs are still more expensive compared to CFLs. For example, a 12W LED bulb from Tesco Malaysia costs RM13 each<\/a><\/span>, but an equivalent 18W CFL energy saver bulb costs RM12.50<\/a><\/span>, and an equivalent 70W halogen bulb costs RM3.50<\/a><\/span>.<\/p>\n

    But taking the lifespan into account, it would cost you RM70 to buy 20 incandescent bulbs, or RM37.50 to buy 3 CFL bulbs, to match the lifespan of 1 LED bulb at RM13.<\/p>\n

    * All stated lifespans may vary by light bulb brand<\/span><\/p>\n

    \"Increase<\/p>\n

    Above: Lifespan of LED, CFL and incandescent light bulbs. Source: <\/span>bu.edu<\/span><\/p>\n

     <\/p>\n

    Estimating running costs<\/span><\/p>\n

    Earlier on, we determined that if we wanted to light a room with a bulb of 1100 lumens, we would need either a 13W LED, an 18W CFL, or a 53W halogen bulb.<\/p>\n

    Next, let’s assume that we will leave the lights on for 4 hours a day. Based on this, we can calculate the running energy as [wattage] * [hours].<\/p>\n

    For example, if we have a 15W CFL bulb running for 5 hours a day for 30 days, we would get: [15 * 5 * 30]\/1000 = 2.25kWh per month<\/p>\n

    Then, we can multiply the running energy amounts with the residential electricity tariff from TNB’s website<\/a><\/span>. For simplicity, let’s assume a flat rate of 21.8 sen per kWh per month. That gives us [2.25kWh per month * 21.8sen] = RM4.905 per month.<\/p>\n

     <\/p>\n

    Putting it all together<\/span><\/p>\n

    If we repeat the same hardware and running costs calculation for different bulbs, this is what we get:<\/p>\n

    \"Calculating<\/a>
    Above: Calculating the hardware and running costs for switching to LED in Malaysian homes (click to enlarge)<\/figcaption><\/figure>\n

    From this calculation, we can see that the running costs for an LED bulb is over 25% lower compared to halogen, and around 50% lower compared to CFL.<\/p>\n

     <\/p>\n

    When to switch to LED?<\/h2>\n

    Even though the costs are clearly lower for LED, you shouldn’t replace all your bulbs right away. Instead, wait for your existing bulbs to burn out before swapping them, to get the maximum use out of them.<\/p>\n

     <\/p>\n

    What about replacing long fluorescent tubes or circular fluorescent tubes with LEDs?<\/h2>\n

    So far, we have compared the costs for three types of lighting; incandescent (or halogen) vs CFL vs LED.<\/p>\n

    However, fluorescent tubes are also commonly used in Malaysia. These are the T8 or T5 tubes, as well as the circular tubes, and it’s possible to replace them with LEDs too.<\/p>\n

    \"T8<\/a>\"Circular<\/a><\/p>\n

    Above: LED replacements for fluorescent tubes. <\/span>Source<\/a><\/span><\/p>\n

     <\/p>\n

    You can find LED equivalent replacements for such tubes, but they are not commonly found at the supermarket. Instead, you may need to visit your nearest lighting shop to get one.<\/p>\n

    Furthermore, the replacement of such tubes is more complicated. Fluorescent tube light casings include two electronic components to work; a ballast, and a starter. If you want to keep your existing light casing, these components will need to be bypassed or replaced before you can swop the tube out for an LED equivalent.<\/p>\n

    Bypassing the ballast and replacing the starter in a T5 or T8 fluorescent light casing requires some rewiring. If you are uncomfortable doing it yourself, you can request the services of a local handyman<\/a><\/span>\u00a0or hire an electrician<\/a><\/span>\u00a0to help you. Hiring a professional also\u00a0ensures your lights will last for a long time.<\/p>\n

     <\/p>\n

    Conclusion: Make the switch to LED once your existing bulbs burn out<\/h2>\n

    From our calculations, LED bulbs are 25% cheaper compared to halogen, and around 50% cheaper compared to CFL. This makes it a no-brainer to switch to LED lights as soon as your existing bulbs have stopped working.<\/p>\n

    As long as you have a common bulb socket, e.g. E27, E14, T8 or T5, you will be able to find an LED equivalent.<\/p>\n

    However, the savings are calculated based on the average lifespan. For popular light bulb brands, the lifespan is clearly stated on the box. However, if you go for lesser-known brands, the lifespan may be more unpredictable. Improper wiring may also affect the lifespan of the bulb. An LED light bulb that fails before the expected lifespan will cancel your cost savings, so it’s best to consult an expert.<\/p>\n

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    \n

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     <\/p>\n","protected":false},"excerpt":{"rendered":"

    We know that LEDs are more energy efficient. But are they worth the investment? We do the math on why you should switch to LED.<\/p>\n","protected":false},"author":33,"featured_media":13457,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_lmt_disableupdate":"","_lmt_disable":"","site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[505,553,556,237,245,18,451,17],"tags":[],"class_list":["post-13440","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bathroom","category-bedroom","category-ceiling","category-electrician","category-handyman","category-interior-design","category-kitchen","category-renovation"],"yoast_head":"\nWill you actually save more with LED lights? - Recommend.my<\/title>\n<meta name=\"description\" content=\"We know that LEDs are more energy efficient. 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