[Ed. Note – far too much material copied directly from Wikipedia; please immediately trim it back to comply with Fair Use. 3 paragraphs and a link. Thank you.]
LED or Light Emitting diode lights for many years could not be made to stimulate light for lamps or to grow plants that has changed now. Also their cost has gone down plus they last much longer than even the mercury energy efficient lights and over their years long life span will more than make back their higher cost. I include a few links in this post but encourage everyone to shop around for the best deal.
For example, a 7 watt LED home light bulb (60 watt direct replacement) will cost $2.00 a year to run left on for 8 hours a day vs. an incandescent which will cost $20.00 and you will have to change it 2-3 times every year. Imagine how much you can save by replacing 4-5 fixtures in your home to LED light bulbs! What’s more LED light bulbs are shatterproof, run cool to the touch, and contain no mercury or hazardous substances like CFL’s so the applications are endless and more importantly safer for your home or business. Earthtech Products makes the switch easy featuring Dimmable LED light bulbs from CREE the world leader in advanced LED modules and stocking a wide range of Home LED light bulbs comparable to 25-100 watt incandescent bulbs to suit all of your home or business lighting needs.
Worried about the high price of food this winter do you have some extra cash, space and a green thumb then maybe its time for a mini green house .
The GrowLED™ Product Line
GrowLED™ PAR20 Spotlight
Fits standard E26/E27 screw type fixtures allowing you to create a indoor growing setup with little cost. PAR20 Size allows you to cover a large area of 1 to 2 square feet per bulb.
During Flowering State: 10-12 Hours per day
During Vegetative State: 16-24 Hours per day
For Indoor Use Only!
Specifications and Dimensions:
– Power Consumption: 12 Watts
– Light Engine: 12 LEDs
– Wavelengths: Red – 620-630 nm, Blue – 460-470 nm
– Input Voltage: 85~260 V AC (Worldwide)
– Beam Angle – 180 Degrees
– Lifespan: 50,000 Hours
– Construction: Aluminum with integral active cooling system
– Physical Dimensions:
Overall Length – 4.50 in (114.30 mm), Diameter – 2.38 in (60 mm)
Weight – 8 Ounces
– Base Types Available: E26/27
Cost to run for one year* – $3.50
Calculated assuming 8 Hours a day operation, 365 Days a Year with $.10 KWh Electricity Cost
Spectrum Growing Application Replaces
Young Seedlings, Fruit and Vegetable Producing plants Metal Halide (MH)
Leafy crops, Plants at end of growing Cycle High Pressure Sodium (HPS)
GrowLED™ Dual Spectrum
Best for all around use, can be used in mid growing cycle High Pressure Sodium (HPS), Metal Halide (MH)
Safety and health
The vast majority of devices containing LEDs are “safe under all conditions of normal use”, and so are classified as “Class 1 LED product”/”LED Klasse 1”. At present, only a few LEDs—extremely bright LEDs that also have a tightly focused viewing angle of 8° or less—could, in theory, cause temporary blindness, and so are classified as “Class 2”. In general, laser safety regulations—and the “Class 1”, “Class 2”, etc. system—also apply to LEDs.
While LEDs have the advantage over fluorescent lamps that they do not contain mercury, they may contain other hazardous metals such as lead and arsenic. A study published in 2011 states: “According to federal standards, LEDs are not hazardous except for low-intensity red LEDs, which leached Pb [lead] at levels exceeding regulatory limits (186 mg/L; regulatory limit: 5). However, according to California regulations, excessive levels of copper (up to 3892 mg/kg; limit: 2500), Pb (up to 8103 mg/kg; limit: 1000), nickel (up to 4797 mg/kg; limit: 2000), or silver (up to 721 mg/kg; limit: 500) render all except low-intensity yellow LEDs hazardous.”.
- Efficiency: LEDs emit more light per watt than incandescent light bulbs. Their efficiency is not affected by shape and size, unlike fluorescent light bulbs or tubes.
- Color: LEDs can emit light of an intended color without using any color filters as traditional lighting methods need. This is more efficient and can lower initial costs.
- Size: LEDs can be very small (smaller than 2 mm2) and are easily populated onto printed circuit boards.
- On/Off time: LEDs light up very quickly. A typical red indicator LED will achieve full brightness in under a microsecond. LEDs used in communications devices can have even faster response times.
- Cycling: LEDs are ideal for uses subject to frequent on-off cycling, unlike fluorescent lamps that fail faster when cycled often, orHID lamps that require a long time before restarting.
- Dimming: LEDs can very easily be dimmed either by pulse-width modulation or lowering the forward current.
- Cool light: In contrast to most light sources, LEDs radiate very little heat in the form of IR that can cause damage to sensitive objects or fabrics. Wasted energy is dispersed as heat through the base of the LED.
- Slow failure: LEDs mostly fail by dimming over time, rather than the abrupt failure of incandescent bulbs.
- Lifetime: LEDs can have a relatively long useful life. One report estimates 35,000 to 50,000 hours of useful life, though time to complete failure may be longer. Fluorescent tubes typically are rated at about 10,000 to 15,000 hours, depending partly on the conditions of use, and incandescent light bulbs at 1,000–2,000 hours.
- Shock resistance: LEDs, being solid state components, are difficult to damage with external shock, unlike fluorescent and incandescent bulbs which are fragile.
- Focus: The solid package of the LED can be designed to focus its light. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a usable manner.
- High initial price: LEDs are currently more expensive, price per lumen, on an initial capital cost basis, than most conventional lighting technologies. The additional expense partially stems from the relatively low lumen output and the drive circuitry and power supplies needed.
- Temperature dependence: LED performance largely depends on the ambient temperature of the operating environment. Over-driving an LED in high ambient temperatures may result in overheating the LED package, eventually leading to device failure. Adequate heat sinking is needed to maintain long life. This is especially important in automotive, medical, and military uses where devices must operate over a wide range of temperatures, and need low failure rates.
- Voltage sensitivity: LEDs must be supplied with the voltage above the threshold and a current below the rating. This can involve series resistors or current-regulated power supplies.
- Light quality: Most cool-white LEDs have spectra that differ significantly from a black body radiator like the sun or an incandescent light. The spike at 460 nm and dip at 500 nm can cause the color of objects to be perceived differently under cool-white LED illumination than sunlight or incandescent sources, due to metamerism, red surfaces being rendered particularly badly by typical phosphor based cool-white LEDs. However, the color rendering properties of common fluorescent lamps are often inferior to what is now available in state-of-art white LEDs.
- Area light source: LEDs do not approximate a “point source” of light, but rather a lambertian distribution. So LEDs are difficult to apply to uses needing a spherical light field. LEDs cannot provide divergence below a few degrees. In contrast, lasers can emit beams with divergences of 0.2 degrees or less.
- Blue hazard: There is a concern that blue LEDs and cool-white LEDs are now capable of exceeding safe limits of the so-calledblue-light hazard as defined in eye safety specifications such as ANSI/IESNA RP-27.1–05: Recommended Practice for Photobiological Safety for Lamp and Lamp Systems.
- Electrical Polarity: Unlike incandescent light bulbs, which illuminate regardless of the electrical polarity, LEDs will only light with correct electrical polarity.
- Blue pollution: Because cool-white LEDs (i.e., LEDs with high color temperature) emit proportionally more blue light than conventional outdoor light sources such as high-pressure sodium vapor lamps, the strong wavelength dependence of Rayleigh scattering means that cool-white LEDs can cause more light pollution than other light sources. The International Dark-Sky Association discourages using white light sources with correlated color temperature above 3,000 K.
- Droop: The efficiency of LEDs tends to decrease as one increases current.
Living quarters for private households. 32% space heating
13% water heating
11% air conditioning
5% wet-clean (mostly clothes dryers)
Commercial Service-providing facilities and equipment (businesses, government, other institutions). 25% lighting
6% water heating
My bold 12% of our energy use is from light alone. ” For example, a 7 watt LED home light bulb (60 watt direct replacement) will cost $2.00 a year to run left on for 8 hours a day vs. an incandescent which will cost $20.00 and you will have to change it 2-3 times every year.
At $2 a year vs $20 a year you get savings plus you consume one tenth the power and create one tenth the green house gas you ordinarily would.
12% of our total energy goes to create light if we all use LED’s we can reduce that number excluding population growth and the growth or further reduction of our economy to making light 1.2 % of our energy consumption. The faster America adopts LED’s the less we need Nuclear Power, the less we need new power plants of any kind and with new power plants that means power companies have less reason to ask for rate increases.
If 12% of America’s power bill is reduced to 1.2% then that means more money in America’s economy. Being Green is good for our economy.
Michelle Bachman and the Republicans however want to encourage light bulb choice meaning LED’s won’t be mandatory in America I guess they want the power companies to keep getting rich off of us.
A parasite economy kills the host the consumer by putting the desires of the parasite the Power companies and the GOP above the best interests of the consumer.