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Energy-Efficient Lighting
Energy-Efficient Compact Fluorescent Lights (CFLs) are cool-operating and highly energy-efficient. Fluorescent bulbs and tubes do not use heat to create light. CFLs contain gas, which, when excited by electrical current, emits invisible ultraviolet (UV) light. The UV light hits a white phosphor coating inside the bulb and the coating changes the UV light into visible light.
Advatages of CFLs over conventional incandescent bulbs:
Advatages of CFLs over conventional incandescent bulbs:
- energy-efficient, using 20-40% less energy than standard incandescent
- CFL bulbs last 10,000 hours or more
- cooler than incandescent or halogen (incandescents and halogens emit substantial heat, increasing cooling costs in home or office)
- institutional lighting
- home-based business office lighting (and throughout the home)
- small, enclosed spaces like closets
- porch entries
- areas where lights are left on for extended periods
- lamps, pole lamps, un-dimmed fixtures, hard to reach areas
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(from energystar.gov)
How Much Light?
Brightness is a description of light output, which is measured in lumens (not watts). Light bulb manufacturers include this information and the equivalent wattage right on the packaging. Common terms are "soft white 60," "warm light 60," and "60 watt replacement."
To save energy, find the bulbs with the light output you need, and then choose the one with the lowest wattage. You can also look for a CFL that is labeled as equivalent to the incandescent bulb you are replacing.
The color of light may also affect how bright a light appears, even if the lumens are the same. Since most people are used to the soft yellowish glow from incandescent light bulbs, CFLs that produce light closer to the color of daylight (color temperatures above 3000K) may appear brighter because the color of the light is less yellow. Learn more about color temperature.
How Much Light Do I Need?
Incandescent Bulbs Minimum Light Output Common Energy Star Qualified Light Bulbs
(watts) (lumens) (watts)
40 450 9 to 13
60 800 13 to 15
75 1,100 18 to 25
100 1,600 23 to 30
150 2,600 30 to 52
Color & Mood
CFLs are available in a wide variety of shades of white light, ranging from yellowish to white to bluish white light, which allows you to customize the mood of your space. Many CFLs come in "warm" colors to match the yellowish light of incandescent bulbs, but you can also choose "cooler" colors with whiter or bluer light.
Choosing the right color:
* Light color is measured on a temperature scale referred to as Kelvin (K).
* Lower Kelvin numbers mean the light appears more yellow; higher Kelvin numbers mean the light is whiter or bluer.
* Most ENERGY STAR qualified bulbs are made to match the color of incandescent bulbs at 2700-3000K.
* For a whiter light, look for bulbs marked 3500-4100K.
* For bluer white light, look for bulbs marked 5000-6500K.
Why Choose ENERGY STAR?
Lighting represents about 20 percent of your home’s or home-based office' electricity bill. Switching from incandescent bulbs to ENERGY STAR qualified CFLs is the easiest step you can take to save on your energy bill and create a sustainable planet for future generations.
CFLs have come a long way in the last 20 years. Today’s ENERGY STAR qualified CFLs use advanced technology; are small; quick to light up; efficient; produce better light; and are available in a variety of sizes, shapes and colors. Some even work on dimmers or three-way switches.
What’s the Difference?
Type of Bulb Incandescent Bulb Compact Fluorescent Bulb
Power Used 60 watts 13 watts
Light Output 800 lumens 800 lumens
Lifetime (Hours) 750-1,000 6,000-15,000
Lifecycle Cost* $40 $10
* Based on a 6,000-hour CFL, a 1,000-hour incandescent, use of 3 hrs/day, 11.09 cents/kWh electric rate, $3.00 CFL, and $0.50 incandescent.
Compared to incandescent light bulbs, ENERGY STAR qualified CFLs:
* Use about one-quarter of the energy to produce the same amount of light,
* Last about 10 times longer,
* Produce about 75 percent less heat, which reduces cooling costs,
* Save about $30 or more in electricity costs over the lifetime of the bulb,
* Have manufacturer-backed warranties, and
* Meet strict energy efficiency and performance requirements.
In 2007, Americans saved $1.5 billion by switching to ENERGY STAR qualified CFLs. The energy saved could light all the households in a city the size of Washington, DC for over 30 years. Put another way, changing these bulbs removes as much greenhouse gas pollution as planting 2.85 million acres of trees or taking 2 million cars off the road each year.
Providing energy-efficient and long-lasting CFL (compact fluorescent light) bulbs is Dolphin Blue's way of creating a sustainable planet for future generations. Thank you for choosing Dolphin Blue as your source of energy-efficient lighting and eco-friendly and environmentally responsible office supplies.
<br />
How Much Light?
Brightness is a description of light output, which is measured in lumens (not watts). Light bulb manufacturers include this information and the equivalent wattage right on the packaging. Common terms are "soft white 60," "warm light 60," and "60 watt replacement."
To save energy, find the bulbs with the light output you need, and then choose the one with the lowest wattage. You can also look for a CFL that is labeled as equivalent to the incandescent bulb you are replacing.
The color of light may also affect how bright a light appears, even if the lumens are the same. Since most people are used to the soft yellowish glow from incandescent light bulbs, CFLs that produce light closer to the color of daylight (color temperatures above 3000K) may appear brighter because the color of the light is less yellow. Learn more about color temperature.
How Much Light Do I Need?
Incandescent Bulbs Minimum Light Output Common Energy Star Qualified Light Bulbs
(watts) (lumens) (watts)
40 450 9 to 13
60 800 13 to 15
75 1,100 18 to 25
100 1,600 23 to 30
150 2,600 30 to 52
Color & Mood
CFLs are available in a wide variety of shades of white light, ranging from yellowish to white to bluish white light, which allows you to customize the mood of your space. Many CFLs come in "warm" colors to match the yellowish light of incandescent bulbs, but you can also choose "cooler" colors with whiter or bluer light.
Choosing the right color:
* Light color is measured on a temperature scale referred to as Kelvin (K).
* Lower Kelvin numbers mean the light appears more yellow; higher Kelvin numbers mean the light is whiter or bluer.
* Most ENERGY STAR qualified bulbs are made to match the color of incandescent bulbs at 2700-3000K.
* For a whiter light, look for bulbs marked 3500-4100K.
* For bluer white light, look for bulbs marked 5000-6500K.
Why Choose ENERGY STAR?
Lighting represents about 20 percent of your home’s or home-based office' electricity bill. Switching from incandescent bulbs to ENERGY STAR qualified CFLs is the easiest step you can take to save on your energy bill and create a sustainable planet for future generations.
CFLs have come a long way in the last 20 years. Today’s ENERGY STAR qualified CFLs use advanced technology; are small; quick to light up; efficient; produce better light; and are available in a variety of sizes, shapes and colors. Some even work on dimmers or three-way switches.
What’s the Difference?
Type of Bulb Incandescent Bulb Compact Fluorescent Bulb
Power Used 60 watts 13 watts
Light Output 800 lumens 800 lumens
Lifetime (Hours) 750-1,000 6,000-15,000
Lifecycle Cost* $40 $10
* Based on a 6,000-hour CFL, a 1,000-hour incandescent, use of 3 hrs/day, 11.09 cents/kWh electric rate, $3.00 CFL, and $0.50 incandescent.
Compared to incandescent light bulbs, ENERGY STAR qualified CFLs:
* Use about one-quarter of the energy to produce the same amount of light,
* Last about 10 times longer,
* Produce about 75 percent less heat, which reduces cooling costs,
* Save about $30 or more in electricity costs over the lifetime of the bulb,
* Have manufacturer-backed warranties, and
* Meet strict energy efficiency and performance requirements.
In 2007, Americans saved $1.5 billion by switching to ENERGY STAR qualified CFLs. The energy saved could light all the households in a city the size of Washington, DC for over 30 years. Put another way, changing these bulbs removes as much greenhouse gas pollution as planting 2.85 million acres of trees or taking 2 million cars off the road each year.
Providing energy-efficient and long-lasting CFL (compact fluorescent light) bulbs is Dolphin Blue's way of creating a sustainable planet for future generations. Thank you for choosing Dolphin Blue as your source of energy-efficient lighting and eco-friendly and environmentally responsible office supplies.
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