Energy efficient light bulbs came into the market when new lighting standards were introduced by Congress under the Energy Independence and Security Act of 2007
Ever since then, gone were the days of the incandescent light bulbs as the new law were designed to usher in a new era of long lasting, cost efficient and greener bulbs.
The light bulb industry has gone through a huge transformation with the old incandescent bulbs being replaced by so many energy saving bulbs. The mixture of old and new bulbs in the market has made shoppers confused with too many options. So let’s take a look at the two energy saving light bulbs and differentiate them to make choices easier.
LEDs or Light Emitting Diodes uses only a fraction of the wattage used to power an incandescent bulb making LEDs much more cost effective in the long run. LEDs are expensive to buy but uses 90% less energy and could last up to 25 years making them the cheapest option as they pay for themselves several times over before replacing them.
LED lights don’t burn out that way incandescent do. Instead, they undergo ‘lumen depreciation’, gradually growing dimmer and dimmer over time. The test that the IES uses to determine a bulb’s longevity is known as the LM80, and it calculates how long it will take for an LED to fade noticeably. Engineers run the bulb for nine months in order to get an accurate read of the light’s rate of decay, and using those figures, they can calculate the point at which the light will have faded to 70 percent of its original brightness. This point, known as L70, is the current standard in LED longevity. If an LED says it will last 25,000 hours, it is really saying that it will take the bulb 25,000 hours to fade down to 70 percent brightness.
CFLs or Compact Fluorescent Lights are cheap and has been in the market for a while but after the Energy Independence and Security Act of 2007, technology of these bulbs has been improved with more colour options to choose from. Some older CFLs took time to light up but there are now dimmable CFLs and ‘instant on’ CFL bulbs.
According to the Energy Saving Trust,
CFLs use about 75 to 80 per cent less electricity than an equivalent traditional bulb and can last up to 10 times longer. They are available in a variety of shapes, sizes, colours and ranges of colour rendering capacity. CFLs are great for replacing standard home light fittings.
Energy Saving Bulbs Compared to other Lighting Technologies
Luminous Efficacy Comparison Chart
Type of Bulb
Luminous Efficacy (in lm/W)
LED A19 lamp (warm white)
LED PAR38 lamp (warm white)
LED troffer 2’x4′ (warm white)
LED high/low-bay fixture (warm white)
High intensity discharge system (high watt)
Linear fluorescent system
High intensity discharge system (low watt)
Compact fluorescent lamp
Lighting Magic has a huge range of lighting to match all your rooms in your house and we have the expertise and advice to point you in the right direction. To get started simply click one of the links below to browse our extensive collections or give us a call on 0161 929 3388 and we will be glad to help you out!