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Disclaimer: The information provided here is of a general nature. Ramin Communications is not recomending the specific products mentioned here and accepts no responsibility for the accuracy of information about specific products. Electricity is DANGEROUS and should not be treated lightly. Information on individual product packaging should be read carefully and understood before installation. The advice of qualified Electricians should be sought on specific requirements and installations.
Unlike CFLs, LED Lamps contain no mercury. For more on Fluorescent lamps and mercury, see end-of-life management and Mercury in Fish .
LED Lighting and Solar Power
LED Lights have lower energy requirements and a longer life than Fluorescent and other lighting technologies, which reduce operation and maintenance costs. How and when we make the transistion to LED Lighting and when this can be solar powered now depends on the cost of the components and maintenance vs the cost of electricity.
Solar Power is the generation of electricity from sun light. Photovoltaics (PV) cells convert solar radiation into direct current electricity. Solar panels are composed of a number of PV cells.
Lighting is generally required, at night or where sun light isn't available. So, the electricity needs to be stored, in a battery, until it is needed. The alternative is to store the "fuel", eg water or coal is stored and used when needed.
The PV cells need to generate enough electricity, for the battery to store, to keep the light on for the time required. Another variable is the amount of sunlight available during a particular day.
The battery needs to store enough electricity for a few nights. The amount of electricity required for each night depends on the length of the night (longer in winter than summer) and the energy use of the lighting. Timers and Light sensors may also require energy to run.
So, we reach the point of balancing the difference components:-
* the lighting,
* PV cells
* length, regularity, frequency, variability, of use
* purpose of lighting (security, advertising, safety, emergency)
* alternative Energy Costs and
* Maintenance - testing, cleaning, replacement and displosal (e-waste).
LED vs other forms of Lighting
Low temperature, energy use and long life is enabling product innovation in lighting design. However, direct replacement LED products are also emerging which improve on the light quality, maintenance and energy requirements of Metal Hydride, CFL, Incandescent and Sodium lamps.
- Rechargeable Direct Replacement Lamps (Globes, Bulbs): LED rechargeable Direct Replacement Lamps provide emergency lighting, when the power fails. This makes them ideal for areas with unreliable power supplies. The Lamps are rated for 1 million hours and use 1.5W.
- 42W, 84W, 126W Direct replacement LED Lighting for Hi-press sodium lamps, 100W, 200W, 300W, Lumens: 3570lm/ 7140lm, 10710lm, CRI: >75,Beam angle: 120 degree Light decay(1000hours): 0.3%-0.8%, IP Rank: IP65, Shell material: Aluminum, Life span: up to 50,000hours
- A metal halide (MH) bulb dissipates 400 watts whereas a LED Lighting equivalent substitute dissapates 60 watts. A MH Lamp with a 20,000 hour life, can have its life reduced by 25% by improper bulb orientation whereas the equivalent LED fixture could have in excess of 50,000 hours of life. The heat dissipation and lighting angle features of LED Lighting can also provide other benefits - such as reducing light polution and the threat of fire. - www.lunaraccents.com
- LED Street Lighting uses 50 percent less energy, with similar light levels, than Metal Halide (MH) road lighting. E.g. a 250-watt metal halide fixture would typically be replaced by a 125 to 150 watt LED fixture. Pulse-start metal halide lamps are rated for 25,000 hours, LEDs are rated 50-100,000 hours. Metal halide lamps contain mercury, while LED fixtures have no mercury or lead - affecting the way the waste can be handled. Lumen Maintenance & Start/Restrike Time - Techfuels LED vs Metal Halide Street Lamps.
- LED Lighting is being used for Street, Tunnel, Flood, Underwater, Ground and Emergency Lighting (in aeroplanes and other public spaces).
- A 2.3W LED Lamp uses less than half the energy of a 5W Fluorescent Lamp, and has three times the life expectancy three times - providing a financial incentive to consider replacing Fluorescent Lamp when the fail, and the price of LED Lighting drops.
Halogens contribute over 30% to your electricity bill. Halogens are 12v MR16 lighting that is installed in roofs. Halogens generally use 50 watts plus a transformer (uses between 10–15 watts). So each halogen light uses about 65 watts of power." - Downlights Comparison Guide
- Long life - Low Energy - Low Heat LED Uplights and Christmas, Wedding, Garden, Fairylights, provide direct replacement alternatives to Metal Halogens and incandescent uplights for gardens and tree lighting. The LED Lighting strings of fairylights are possibly the earliest LED driven lighting design innovation.
- "This report concludes that where possible, option 2, replacing 80W MV streetlights
with 2x14W T5 luminaires instead of option 3 (replacement with 42W CFLs) is
recommended, due to their enhanced financial and environmental performance.
Where the T5 s cannot be fitted (i.e in some decorative fittings) the use of 42W CFLs
is recommended." - Strategic State wide Business Case Sustainable Public Lighting in Victoria September 2008
Batteries store and discharge electricity through a chemical reaction.
Industrial Batteries:-Li-SOCL2, Li-MnO2,Li-SO2,Lithium-ion,Li-Polymer,Ni-Mh, Ni-Cd, Sealed Lead Acid. Consumer
Batteries also come in a variety of forms to suit the energy and physical requirements of the device to which they are used from Alkaline batteries for Torches to more expensive rechargeable, higher capacity and longer life standard and custom batteries for Cameras, Camcorders, Laptops, Cordless Phones, Mobile Phones, Walkie-Talkies, Remote Controls, Emergency Lighting and Powertools. - Minmaxenergy
Sensors, Timers and Switches
The choices are always on, manual switch, timer, light sensor and movement detector . Each suited to particular requirements.
http://ramin.com.au/eco-sydney/LED-Lighting-Solar.shtml © Ramin Communications 2010-2. Last modified 1 October 2012.