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Published on June 23rd, 2014 | by RepairClinic.com Staff

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How to choose an energy efficient light bulb (without sitting in the dark)






The recent phasing out of incandescent light bulbs has many people scratching their heads trying to figure out what the best alternative is (or they’re stock piling incandescent bulbs). In the past, you could tell if someone had installed CFLs in their home because you couldn’t see anything upon entering their abode. LEDs had the opposite effect – they were cold and harsh to the eyes. However, the light bulb market has opened up and CFL and LED light bulbs have come a long way and there are now some very good alternatives to the incandescent light bulb. The best way to assist you in weighing your options is to get you familiar with some of the terms in the lighting world.

Wattage: indicates how much power a light bulb uses. This measurement is commonly used by consumers to figure out the brightness of a bulb, but this is incorrect because not all light bulbs convert wattage into visible light as efficiently as others. This is where lumens come in.

Lumens: a measure of visible light emitted by a source. This number indicates the actual brightness of the bulb.
Luminous Efficacy: This is a measurement of how efficiently a light source converts power into visible light, or wattage into lumens.
Color temperature: A characteristic of visible light which measures the color that a light source produces. This ranges from low (warm and yellow/orange) to high (cold and blue).

We’ve become used to looking at wattage as a determination to how bright a bulb is going to be. Now with different technologies on the market, wattage should no longer be used when figuring out brightness. Wattage only reflects how much power is being used. Lumens tell how bright a bulb will be.

Here is some handy information from EnergyStar.gov about how many lumens your old incandescent bulbs put out:

  • 40 watt incandescent bulb – > 450 lumens
  • 60 watt incandescent bulb – > 800 lumens
  • 75 watt incandescent bulb – > 1,100 lumens
  • 100 watt incandescent bulb – > 1,600 lumens
  • 150 watt incandescent bulb – > 2,600 lumens

So when looking for a replacement bulb similar to the bulbs you’re used to, keep this chart in mind.

The other thing to keep in mind when picking out bulbs is the color temperature. The color temperature scale is measured in Kelvin and for light bulbs ranges from around 1,000K to 10,000K. Incandescent lights, which have a “warmer” tone, actually reside on the lower end of the scale at about 1,800K. So if you’re looking to replace your light bulbs which a bulb with a similar color temperature, look for something in that range. If you like more “direct sunlight,” look for something around 4,800K. Keep in mind, the higher on the scale you get, the “cooler” the color temperature. At the high end of the scale the light will look blue, similar to how all LED lights looked when they first came onto the market. These days, however, it is possible to purchase LEDs and CFLs in all color temperatures.

When it comes to purchasing new light bulbs, it is completely up to the preference of the buyer. LEDs typically last longer (some last up to 25 years!), use less power (thus costing less), are durable and achieve their highest brightness the second they are turned on. CFLs have a shorter lifespan (but still significantly longer than incandescent), use a bit more power (also still significantly less than incandescent), are very breakable and take a little while to achieve their highest brightness. The upside of CFLs is that they better imitate the light produced by incandescent light bulbs we are all used to in our homes.

The best advice we can give when it comes to light bulbs is to just purchase a couple different light bulbs and try them out. It is all a matter of preference. In the last couple of years, the prices of LED and CFL light bulbs have drastically dropped, making it less expensive to test your options.

What has your experience been with these light bulb options? Let us know in the comments below.

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One Response to How to choose an energy efficient light bulb (without sitting in the dark)

  1. Russell says:

    Also note that the whitening agents used in laundry detergent are fluorescent. LED bulbs do not have emit the light frequencies for the fluorescent, so your whites may appear a bit dingier under LED than CFL or incandescent light.

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