Technology that sets a New Paradigm for Lighting Systems
Reliability, Durability & Energy Savings


The “eLightSaver” ballast has three times the Life Expectancy of today’s magnetic or digital electronic ballast industry standards. So, it is more reliable and durable than magnetic or digital electronic ones. The “eLightSaver” ballasts have been done for very long lasting.
According to certified reliability calculations, the most critical components of the “eLightSaver” let determine that its Useful Life Expectancy is over 15 years.
The “eLightSaver” does not requires the use of external ignitor or Electrolytic Capacitors (like magnetic ballasts do) to operate the lamp. These elements have a relatively short useful life.
Furthermore, all components of the “eLightSaver” have been calculated to operate in the most extreme electrical and climate conditions. 
Special design “Polypropilene” capacitors are used for very high frequency and very high temperatures (up to 105oC) applications.
Special design “Polyester” capacitors of a very high temperature (up to 125oC) are used for DC stage of the circuit. 
All capacitors are self-healing. 
Protection Sensors are specified to be
capable to operate up to 50 years with maximum cycling. 
Both, common and normal modes Transient Voltage Surge Suppressor for both, AC and DC circuits.
Integrated Circuits (lineal or microprocessors) are NOT used in the circuit. It makes the “eLightSaver” highly immune against high energy transitory occurrences like surges and spikes (principal enemy of I/C's and Microprocessors).






Lamps operated with the “eLightSaver” last twice than those operated with magnetic ballast and 50% more than Life Expectancy specified by manufacturers. The delay in the blackening of the arc tube provides a lower Lamp Lumen Depreciation (LLD) during the lamp useful life.

The main component in HID lamps affected by the operation with magnetic ballasts is its system of electrodes. Using lamps with magnetic ballasts, content in these electrodes tungsten tends to evaporate by effect of the pulses of high voltage power for "heat" of an "invasive" way (melting practically) electrodes and able to obtain light generating, thus a high wear and tear on them (as noted in the following figure), then tungsten is "adhering" to the walls of the chamber, obscuring it (see figure above) and deteriorate the properties of the gas, causing permanent and progressive damage of the lamp. All this leads to a continuous loss of the level and quality of the produced lumens. Also lamp voltage increases during operation time producing an additional power that is not used to emit light (less efficacy and less efficiency). 



The phenomenon is very noticeable in MH lamps and to some extent in HPS lamps and largely occurs during turning on (especially in reigniting when the electrodes are very hot) and to a lesser extent during continuous operation thereof. This problem is drastically reduced with “eLightSaver” high frequency resonance technology that allows avoiding deterioration because electrodes are "attacked" superficially (skin effect produced by high frequency) and thus generating savings and life benefits which are described later.
This phenomenon can be seen in the previous figures where noticeable camera arc (arc tube) cleaning and a detail of the electrode when a MH lamp is operated by the "eLightSaver" 8,000 hours (mean), while the operated by magnetic ballasts presents pollution and blackening over the period of time, resulting in a strong decline in the produced lumens.
The following curve shows clearly how "opacity" phenomenon affects MH lamps "mortality" to compare the lumen depreciation behavior of a lamp operated with "eLightSaver" versus another one operated with a magnetic ballast.


On the other hand, generally, when magnetic ballast is used to feed an HID bulb, the concept of "Mean Lumens" produced is set to indicate the amount of lumens needed for a given installation. For example, a MH lamp with 20,000 hours of expected life, this is true at 8,000 hours of operation and for HPS with 24,000 hours of life the same is true at 12,000 hours.

On Mean Lumen point for magnetic ballasts (black curve) and, for example, 400W MH Probe-Start lamp life curve, the lumen level is 60-65% of the initial lumens. Decay is 35-40% on average. According to the preceding figure, if operates a MH lamp Pulse-Start 320W ballasted "eLightSaver" (yellow curve), you will see that same 8,000 hours this lamp illuminates around 90% or more of the initial lumens, i.e. a higher level of 25-30% vs. a magnetic ballast to operate a 400W MH Probe lamp. This brings with it very significant energy savings by requiring total fewer luminaires or less power per luminaire, to comply with the required level of lighting.
If you carefully note the curve, observed that a lamp MH 400W Probe operated a ballasted magnetic will need to be changed in approximately 14,000 hours, rather than theoretical 20,000 hours useful life indicated by the manufacturer, but using an "eLightSaver" ballast with a MH lamp 320W Pulse-Start e.g. tuned to 320W (plus forward will explain this "tunning process" in more detail) this replacement could be made after 32,000 hours to obtain the same levels of illumination of MH Probe of 400W, i.e. more than 2 times real useful life, or 50% more than the specified by the manufacturer.
This means that over a period of 15 years or 50,000 hours of operation, a luminaire with lamp MH operated with magnetic ballast that lamp is there will be replaced 3-4 times, the ignitor and condenser approximately 8-9 times together and ballast as about 3 times, while with the single "eLightSaver" would have been a single change of lamp, there are no ignitors nor substitute capacitors and ballast, for his long life, there is no need to be replaced in that time period.

Another important to highlight is that the "eLightSaver" technology has been developed that ballast can be "tuned" to make work lamp power child (up to 10-15% lower) to the specified taking advantage of the fact that when the lamp is operated with "eLightSaver", lumen depreciation curve is much more flat than when using a magnetic ballast. Thus we see that lamp 400W MH Probe-Start can be replaced by a lamp MH Pulse-Start 320W operated with "eLightSaver" in "dimming" at 290W obtaining the same quality and quantity of lumens in time (blue curve). This difference in power substantially increases both the efficacy and efficiency apart from providing a lower lamp lumens depreciation during theoperationtime because the lamp is working with less power and, therefore, further increasing their service life. The above figure illustrates different possible tuning points for a MH Pulse-Start lamp of typical 320W vs. 400W MH Probe-Start lamp operated with magnetic ballast.


For the case of HPS (high pressure sodium) according to the figure above, if it operates this same lamp with a "eLightSaver" ballast (yellow curve) rather than with a magnetic ballast, it notes that at 12,000 hours (mean lumens point) illumination level is 94% of the initial lumens, i.e. a higher on average 5% difference regarding magnetic, which brings important energy savings to require the use of less power per luminaire and thus equate the desired lighting level.
Observing carefully the black curve, is noticed that a lamp operated with a magnetic ballast will require to be changed in approximately 18,000 hours, instead of 24,000 hours theoretical life indicated by the manufacturer, but, using a ballast "eLightSaver", this change may be done at 32,000 hours, i.e. almost twice the actual useful life and 50% more as specified by lamp manufacturers. The curve defines that the lamp is unusable when the lumen production is less than 75% of the initial lumens.
This means that in a period of 15 years or 50,000 hours of operation, a luminaire with HPS lamp operated with magnetic ballast, the lamp will be needed to be replaced more than 3 times (also the ignitor and capacitor approximately 8 times between both and ballast approximately 3 times), while with the "eLightSaver" only would have made a change of lamp in the same period, and since there are no ignitor or capacitors to substitute and as ballast is long-lasting, the visits by maintenance will decrease drastically.

Another important to highlight is that the "eLightSaver" technology has been developed in order to ballast can be "tuned" to make work lamp power slightly lower (2.5% or 5%) than specified by leveraging the fact that when the lamp is operated with "eLightSaver" lumen depreciation curve is much more flat than when using magnetic ballast. Thus for example 100W lamp can be operated in "dimming” at 96W to get the same quality and quantity of lumens versus a lamp operated with magnetic. This difference in power increases both the efficacy and efficiency of the system by using "eLightSaver". The above curve illustrates different possible tuning points for a typical HPS lamp.

Finally, if you use double (dual arc) arc lamps get up to 4 times the actual service life of a standard lamp operated with magnetic ballast. The following curve exemplifies this assertion.


The TOTAL energy saving achieved using "eLightSaver" technology versus traditional systems based on magnetic ballasts can be computed based in two parameters:
1) Electrical Efficiency: Measures the amount of active power (measured in watts) which consumes the ballast itself to deliver the specified power, i.e. the difference between the power applied to the lamp (output) and what is injected into the AC input ballast (input). For the case of the "eLightSaver" and taking into account a power equal to the specified output, Efficiency is 93% to 95% (average 94%) according to the power of the ballast and for a magnetic ballast is in the order of 80% to 90% (average of 85%), which provides initial direct savings power in favor of the "eLightSaver" of 11%. These calculations apply to both cases, MH and HPS.
2) Lighting Efficacy: Measures the amount of lumens produced per unit of power demand in Watts (L/W). As described before, magnetic ballasts, by concept of Efficiency, tend to consume more energy to produce the same amount of lumens or, worse, produce fewer lumens to increase their demand for energy. However other 2 factors must be taken into account:
2.1) Blackening phenomenon: As explained earlier, due to the flat shape of the curve of lumen depreciation resulting from using the "eLightSaver", due to the absence of the phenomenon of blackening, it has been shown that delivering less power to the lamp can result the same luminous behavior over time. In the case of MH Probe vs. MH Pulse it was noticed a difference in average of 25% to 30% lumens who can match, according to the same curves, down 10% the power delivered to the MH Pulse lamp. However, following in the same case, it also notes that this difference is supported by a lower power lamp (320W vs. 400W) which adds 20% more power saved.
This means that comparing magnetic Probe vs. "eLigthSaver" Pulse, we can add 30% more energy savings by this concept. If comparing magnetic Pulse vs. "eLightSaver" Pulse, the lumens difference in average reach maximum 15% but the power of comparison is now the same (e.g. 320W vs. 320W). Then, in this case, to match the average lumens lamp using "eLightSaver" should be by applying 8-10% less power to the lamp. This means that comparing Pulse magnetic vs. Pulse "eLigthSaver" in MH, we can add 8 to 10% more energy savings by this concept.
As described before, the savings in HPS lamps is in the order of 5% using "eLightSaver".
In addition, the blackening increases the power applied to the lamp. This increment is in the order of 3% in power for MH and 2% for HPS in average during the operation time.
2.2) Wasted lumens: As shown in the figures below, both HPS and MH, degradation of electrodes produces a large curvature on the Lumens vs. Time graph for magnetic ballast, and to be the beginning and ending lumen values very distant from the Mean Lumens point, magnetic system are even less efficient from the point of view of energy and efficacy. The difference area between the Mean Lumens horizontal line point and the black curve (sum of the areas purple and red), is wasted lumens for magnetic case area. In the case of the "eLightSaver" (yellow line) only (much smaller) waste corresponds to the sum of the areas blue and purple zone. Then gets an additional savings average of 8-10% for MH systems and 3-5% for HPS systems, to operate such lamps ballasted "eLightSaver" by this concept.

The following table summarizes the TOTAL of the percentages of energy savings in each case described above:


Using “eLightSaver” let’s end user to save costs related with installation and maintenance of the lighting system.

Installation: The low weight of the "eLightSaver" to be built with an electric RLC circuit with power transistors allows high speed and ease of installation and use of less support tools. Also the low weight generates efficiency in handling, storage and possible replacements of ballast in the long term. The "eLightSaver", a typical weight 1 kg, has only between 10% and 30% of the weight of its electromagnetic equivalent ballast.

Maintenance: Due to the long life of the "eLightSaver" by the total absence of wear elements (ignitors, electrolytic capacitors, integrated circuits and/or microprocessors), is not required any maintenance routine throughout the useful life of the ballast. This means that over a period of 15 years or 50,000 hours of operation, a luminaire with MH lamp operated with magnetic ballast, that lamp will be replaced 3-4 times, the ignitor and capacitor approximately 8-9 times together and ballast as about 3 times, while with the single "eLightSaver" would have been a single change of lamp, there are no ignitor nor substitute capacitors and ballast, for his long life, there is no need to be replaced in that time period.

In short, "eLightSaver" installation costs are 65% less and maintenance costs less than 85% for electrical facilities with magnetic ballasts, which yields a saving of more than 75% in areas of installation and maintenance.


The "eLightSaver" is the only resonant ballast with electronic design in the industry with a CAPACITIVE power factor between 0.87 and 0.95 to commercial electrical network. Group of lamps operated with "eLightSaver", in a typical lighting system, will allow offset power factor that usually produce inductive loads installation.

Electrical current in the branches and connections decreases significantly due to compensation that produces lighting operated by "eLightSaver" workload. Also the value of the resulting apparent power in KVA will be lower than the conventional, substantially improving levels of power demanded in the facilities.
The above figure also makes it possible to observe that the levels of current harmonics (THD) are in the order of 15% to 25%. In new installations, both of these facts result in significant savings on wiring to be used smaller caliber cables.


So far described the many savings possibilities of "eLightSaver" technology through:
- Tuning in points of equal light quality and lower power operation.
- High efficiency and efficacy.
- Less wasted lumens in time.
- Extended life both lamp and ballast.
- Drastic reduction of installation and maintenance costs.

In addition, the "eLightSaver" features as optional models of ballasts with the possibility to choose different levels of lighting using "dimming".
Therefore Corporation has done extensive tests trying to find a way to more easily possible to carry out this process trying to this option does not decrease the reliability of the system to incorporate additional electronic elements that already avoided in the design of the "resonant ballast" system. I.e. great technology to achieve a ballast without electrolytic capacitors and without integrated circuits for a maximum lifespan of up to 15 years, effort cannot be thrown overboard when it comes to establish a reliable and efficient system of "dimming".

In this sense, the "eLightSaver" offers a simple and reliable system to be able to choose up to three levels of lighting:
- Main level with maximum illumination (which is achieved, as already seen above, thru tuning the ballasts in lower power operating point than specified which already constitutes an initial dimming).
- Second level medium lighting with extra savings.
- A third level minimum specified lighting or maximum saving energy (minimal power at the lamp). 

The "eLightSaver", when it is manufactured for "dimming" option, offers two control cables and a third "common" cable used for this purpose. If you want to perform the dimming in unobtrusive way, which is the most advantageous option for reliability because it does not require any additional circuit as part of the ballast, this option can be in two ways:

1) Manually, by connecting each control cable to a simple ON-OFF switch (the initial position must be ON or closed contact) of at least 5 Amp AC, 300V, which must be provided by the end user for each switch enable desired levels of illumination manually when you decide. When both switches are ON or closed, it is delivering the maximum power for maximum lighting. When you open any of them, is being delivered to medium lighting and to be open both the minimum power. The customer should indicate light values you want for each position for the precise tuning of ballast from factory.

2) By offering timers or sensors with normally closed contact that opens as the event that suits incurred the dimming:
- An electromechanical timer (recommended electromechanical type for reliability and costs), for example, selects the first contact (from closed to open) approximately 5 or 6 hours of dusk and perform an initial 20% dimming when the streets are empty and then activates a second contact, may be 2-3 hours later, to dimming up to 50% lighting until dawn.
- Transit (movement) detector in resting position (there are few vehicles or pedestrians around) allows minimum or medium lighting and when it detects vehicular or pedestrian traffic increase put in position of maximum illumination. This transit detector would be in "series" connections with the photo cell, i.e. turns ON when dark and turns OFF when the sun rises.

And so many other combinations of sensors, photo cells, timers to be used interchangeably for choosing lighting levels preset through simple ON-OFF contacts. Again, the idea is to promote the reliability of the system and while less electronics be used, better. This element of control operates in unobtrusive way by steps or levels and does not generate side-effects in the lamp, or premature deterioration of electrodes (problems inevitably in magnetic ballasts with "bi-level" dimming system).
3) Electronically using a typical analog 0-10VDC control system. In this case, we can offer the option of a electronic interface (not recommended for reliability) to "translate" analog tiers to the three discrete levels offered.

This optional system allows end user to substantially increase the levels of energy savings, by combining natural savings by operation with "eLightSaver" with huge extra savings when dimming.
















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