LED LIGHTING & SIGNALLING

ADVANTAGES OF LED AS A LIGHT SOURCE OVER CONVENTIONAL ONES

·         The colour Rendering index is around 80 which gives a very natural feel.

·         LEDs produce more Lumens per watt than do incandescent bulbs, FTL or even CFL , HID Lamps. Almost all the energy given to LED is converted into LIGHT of the intended colour unlike the other light source wherein most of it is converted to heat.

·         The solid package of an LED with built-in or external lens can be chosen to focus its light, Thus  a directional pure light. There is no light pollution, spillage thus the usable light is the highest in case of LEDs.

·         The power consumption for equivalent illumation with the present LED available is in the ratio 1: 25 for unidirectional lighting. With wider distribution angle LED the dispersed lighting can also be around more than 1: 5 as compared to the CFL as well.

·         In spite of the voltage drops there is no significant change in the light output. Thus it is ideal source of light for wide input voltage or long lighting circuits where there is voltage drop at extremes.

·         LEDs light up very quickly, A typical LED will achieve full brightness in microseconds thus ideal for open area lighting where immediate illumination is a must. LEDs full illumination & switch off – on is literally instantaneous thus it can be used in applications that are subject to frequent on-off cycling, unlike fluorescent lamps or conventional lamp. 

·         LEDs, being solid state components, are difficult to damage with external shock, or VIBRATIONS. Fluorescent and incandescent bulbs, HID Lamps are easily broken by shocks. Thus ideal for mining operations where there is blast vibrations.

·         LEDs have an extremely long life span. The manufacturer calculated the ETTF (Estimated Time To Failure) for their LEDs to be between 100,000 and more with more than 85% rated maintenance. Fluorescent tubes , HID Lamps typically are rated at about 30,000 hours, and incandescent light bulbs at 1,000-2,000 hours.

·         LEDs can be very small and are easily populated onto printed circuit boards for high wattage configuration.

·         LEDs do not contain mercury, while compact fluorescent lamps other HID Lamps, do thus more ECO-FRIENDLY. The heat generation in LED is the least as compared to incandescent lamp or Fluorescent , HID Lamps, thus more ECO-FRIENDLY.

·         LED  light source and fitting does not contain any type of ballast, ignitor, condenser makes the fitting completely maintenance free.

Thus considering the extremely long trouble free life and the energy and maintenance costs over longer period LED lighting surpass incandescent, CFL as well is HID Lamps in effectiveness.

FEATURES OF FILAMENT LAMP , FLUORESCENT & HID LAMPS

Incandescent Bulbs / Filament Lamps

100-year-old Inefficient Light Technology

Incandescent bulbs use a 100-year-old technology that generates light by passing a large amount of electrical current through a small wire. This wire glows white-hot (almost) and radiates energy in all directions. A consequence of this method of generating light is that only 15% of the energy produced is visible light; the remaining 85% is dissipated as heat!

Compact Fluorescent Lamps

Convenient, but Fragile, Complex and Environmentally Hazardous

Compact fluorescent lamps (CFLs) were developed as a relatively efficient alternative to incandescent bulbs and many solar-powered outdoor lighting products utilize these lamps as their light source.

In short, fluorescent lamp technology consists of a thin glass tube filled with argon/mercury vapor. At each end of the tube are metal electrodes coated with an alkaline-earth oxide that gives off electrons easily. When a current is passed through the ionized gas between the electrodes, the fluorescent lamp emits ultraviolet radiation. The inside surface of the fluorescent tube is coated with phosphors, typically zinc silicate or magnesium tungstate. These phosphors absorb the ultraviolet radiation and re-radiate the energy as visible light. A fluorescent lamp will operate until the alkaline-earth oxide coating on its electrodes is depleted.

When starting a fluorescent lamp, the unit requires a "boost" in the form of a starter and ballast that provide up to four times the operating voltage in the beginning.

Disadvantages of CFLs:

• Unfocused illumination. Similar to incandescent bulbs, CFLs create unfocused light, and produce an uneven illumination. To compensate, systems using fluorescent lamps typically install reflectors to redistribute the output, which is inefficient and creates an additional level of complexity and cost to the product.

• High energy consumption. CFLs can consume up to 20 watts, depending on their application (although the tubes are listed at a lower wattage, it is important to consider that the driving ballasts use energy as well). This level of power consumption requires large, expensive solar modules and associated installation hardware to generate the required energy. In addition, large batteries are required for power storage and typical reserves are less than a week - this doesn't leave enough autonomy to compensate for seasonal or poor climatic conditions.

• Difficult to power manage. CFLs tend to be either "on" or "off". Although it is not impossible to adjust the output dynamically, it is a complicated process. This makes power management difficult, imprecise, or non-existant, which is a liability for solar-powered lighting products where the source of power varies according to seasonal fluctuations and prevailing weather conditions.

• Short operational life. The rated life of typical CFLs is about a year and products using them require regular maintenance. This increases the life cycle cost of the product in terms of servicing labor, storage costs and proper disposal (fluorescent tubes and their ballasts are considered hazardous materials).

• Temperature degradation. Manufacturers of CFLs conduct their rated life and light output calculations under ideal operating conditions and temperatures that usually do not reflect the actual environmental conditions. The performance and lifespan of CFLs is dramatically degraded by extremes in ambient temperature.

• Fragility. Another drawback with CFLs is that they are composed of fragile glass tubing. If the fixture is impacted with minimal force, the tube will break and the lamp will cease to operate. Moreover, the resulting glass fragments are sharp and dangerous.

• Hazardous materials. The EPA in the United States regulates the disposal of CFLs because of they contain highly toxic mercury. The ballasts are also regulated under the Toxic Substance Control Act (TSCA) and Comprehensive Environmental Response Compensation and Liability Act (CERCLA) because they contain PCB's and other toxic components.

DISCHARGE TUBES LAMPS – HID LAMPS - (HP – MV / SV / MH)

·         HID lights are usually only used for the low beams.

·         They are more efficient than regular incandescent bulbs (higher lumens/watt).

·         HID lights are also supposed to enable you to mimic daylight better than traditional incandescent lights BUT is definitely not comparable to LED.

·         HID lights do cause a lot of glare for oncoming traffic, especially when the ground is wet and the light reflects off the ground.

·         HID lights are VERY expensive to replace, the discharge tube has a limited life.

·         HID light dependence on Ignitor, Capacitor and Electromagnetic ballast is too much for its overall performance. However, they typically do last much, much longer than regular incandescent bulbs.

·         The heat generation is very very high thus the carbon emission.

·         The depreciation in the rated luminosity is very fast( within the very first year)

·         The restart of a HID lamp is delayed until its cooling.

Techno Economical Analysis & Other Advantages:

DGMS APPROVED LED LIGHTING FOR UNDERGROUND MINES      

LED SIGNALLING / WARNING LIGHT & WELLGLASS TYPE LED PATHWAY LIGHT

Techno Economic Efficiency of using LED illumination in Underground Mines:

• The power consumption for equivalent illumation with the present LED available is in the ratio 1: 25 for unidirectional lighting. With wider distribution angle LED the dispersed lighting is also more than 1: 10.

• Thus considering the extremely long trouble free life and the energy and maintenance costs over longer perion LED lighting as well as signalling surpass incandescent or  compact fluorescent lamps in effectiveness.

• Thus taking a case study of 1000 fittings using incandescent, FTL or CFL fitting (equivalent of 9 watts LED for 110 volts operations in just electricity saving itself will be as under:

The only Disadvantage of using LEDs  as a Light source:

• LEDs are currently more expensive hence the initial installation cost is slightly high than more conventional lighting technologies. However, when considering the total cost of ownership (including energy and maintenance costs), LEDs far surpass incandescent or  compact fluorescent lamps.

THUS IT IS AMPLY SUBSTANTIATED THAT THE FUTURE LIGHTING IS BY LED WHICH IS IN THE INTEREST OF THE COAL INDUSTRY AS WELL AS THE WHOLE COUNTRY WHICH IS POWER STARVED

LED LAMP MODULES DOMESTIC & COMMERCIAL:

The other LED Lighting products we presently offer is the retrofit replacements for all filament lamps and CFL for dispersed down lighting or focussed lighting for indoors as well as for ourdoors replacing GLS lamps upto 200 watts and CFL upto 50 watts. Rather a total LED solution can be designed for specific domestic and commercial  needs.

LED LAMP FITTINGS FOR COMMERCIAL & INDUSTRIAL USE:We offer sulutions in LED Lighting units for all Industrial & Commercial applications as as well. replacements for 70 MH to 250 watts MH for Flood Lighting and 160 Watts MLL to 250 watts HPMV in Factory shed down lighting. The details can be had from LED Street Light Brochure & LED Flood Light Brochure.

Please note all the above shown fittings are designed for one to one replacement for existing GLS / HPMV / Halogen / Tube Light / & CFL. A carefull study is required for replacement for the same which will be attended by our experienced team of engineers.

Also please note as all the above shown options are totally manufactured by us we can vouch for the guarantee of the same in terms of light output and life.

Please click on pic of LED Street Light & LED Flood Light to get more details of the fittings.