Recently, I had to purchase all the light bulbs for our new house. Let me start by saying that you never really realize just how many light bulbs a house uses until you have to go buy all of them at once.
Since I was buying a bunch of bulbs, I thought it would be wise to try to stay "green" and get
Compact Fluorescent (CFL) bulbs wherever possible. CFLs use roughly 75% less electricity than an equivalent incandescent (standard) bulb. So if they use less electricity and make your electric bill lower, why doesn't everyone have all CFLs in their houses? Comparatively, the technology is still new. Here's some things I have noticed about CFL technology that some people may perceive as a reason not to switch to them. Most are issues from when the technology was brand new, and have been taken care of by the manufacturers already. Others are just perceived problems.
1. CFLs Are More Expensive
Generally speaking, CFL bulbs will be a higher initial investment cost. However, many electric companies will provide cash-back rebates for buying the Energy Star CFLs. When I bought my bulbs, they were on sale and there was the electric company rebate ($2/bulb). I got some standard mini-twist bulbs for about $1/bulb and some BR30 reflector bulbs for about $3/bulb. This is very close to incandescent prices.
Additionally, these bulbs will pay for themselves in electricity savings. Check out
this post to see how to calculate your savings for a single bulb. Using this formula, you can calculate that a 15 watt CFL can save you about $7.21 per year per bulb compared to an equivalent 65 watt incandescent (based on 4hrs of usage per day and $0.10 per kilowatt-hour). You can see that the savings can start to add up.
Besides electricity savings, CFLs have a longer life span. At my current home, I had a light fixture that was burning out standard bulbs every couple months. I put a CFL in there and it's been 4 years without burning out.
It is important to point out, however, that not ALL CFLs will be reasonably priced. For example, dimmable CFLs are still a very new technology. I needed six BR30 reflectors for a set of dimmed, recessed lights. The dimmable CFLs were about $11/bulb compared with $2/for the incandescent. I opted not to spend $66 on those bulbs at this time, but will check again for lower prices as the technology progresses.
So, overall, most CFLs are going to be reasonably priced and nearly all will be cost effective in the long run.
2. CFLs Come In Ugly Shapes -or- CFLs Don't Come In The Shapes I Need
It's true that the first CFLs on the market were the
mini-twist style bulbs, and these bulbs are not the most aesthetic choice. However, these bulbs are great for fixtures with covers.
For fixtures with exposed bulbs, you may not want to see the twist of a CFL. Luckily, CFL manufacturers have identified this and have begun creating bulbs with covers in many of the standard shapes:
Type A,
Reflector/Flood,
Vanity Globe, and even
Candelabra.
With these shapes, you can fit most of your lighting needs. However, some of them, the candelabra bulbs for example, are still bigger and/or give off less light than an incandescent, so they may not be right for all your fixtures.
3. CFLs Produce Ugly Light
Again, the earliest CFLs produced mostly white light similar to fluorescent tube lighting in office buildings. While this is great for task lighting, it doesn't really give you a warm feeling for your house. Again, it should be noted that manufacturers have taken this into account and have begun producing bulbs with different
color temperatures. The higher the color temperature in Kelvins, the whiter/bluer/cooler the light. A regular incandescent bulb will have a color temperature of around 2700K and produces light with a "yellowish" hue. A "cool white" bulb will most likely be closer to 3000K and a "daylight" bulb will be upwards of 5000K. You should be able to find the color temperature listed on the bulbs so you can choose one with the light you prefer.
Another thing to note, however, is the Color Rendering Index (CRI) given to each bulb. The CRI is a number 0-100 that describes how accurately the bulb renders color off of other objects. A bulb with a CRI of 100 will cause objects lighted by the bulb to show their true colors while a CRI of 65 will not produce truly accurate colors. I have noticed that most CFLs seem to be in the 80-90 CRI range while incandescent can be in the high 90's. This will most likely get even better for CFLs as the technology comes along.
4. The Mercury In CFLs Is Dangerous
It's true that most CFLs contain some amount of mercury, a chemical which has been shown to cause problems when in contact with the human body. Despite the fact that manufacturers are working to reformulate their products to use less or no mercury, people still hear about this in the media and just to the conclusion that CFLs are bad. It is important to note that most of the mercury dumped into the environment is emitted in air pollution from coal burning power plants. Air emissions are likely more dangerous than a contained break of a CFL bulb. In addition, the amount of mercury in a CFL is so low that is actually lower than the amount of mercury that would be spewed by a coal power plant using an incandescent bulb (remember CFLs use less energy).
Summary
So most concerns about CFL technology have been taken care of by the manufacturers and others are in the process of being fixed. As the technology matures it will only get better, but I think we are currently at a point where the cost of entry vs the benefit makes sense to start using them.
Buy CFLs:
