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COMMON INFORMATION

  1. Comparative analysis of the elemental base, which constructs the lightdynamics
  2. Advantages of the fluorescent lamps.
  3. Ways of the power supply for the fluorescent lamps.
  4. Technical and economic assessments.

Comparative analysis of the elemental base, which constructs the lightdynamics


The outdoor advertising constructions, which have limited lightdynamic abilities (or even haven't them at all), have low efficiency characteristics.

People become accustomed quickly for these sights and after some time they won't observe them. They'd interpret these advertisings as an ordinary source of light at night. Devices, which provide the lightdynamic effects traditionally use such elements as:

  • incandescent lamps;
  • light-emitting diodes;
  • neon.

Incandescent lamps have:

  • low light efficacy (the luminous efficiency of such lamps is very low – for about 17 lumen/watt);
  • low lifetime (for about 2000 hours);
  • light temperature in a 2800?3000 ?C range. As a result we have an yellowish hue of the area, which they illuminate;
  • low coefficient of efficiency and, as a result, some problems with thermal conditions.

Light-emitting diodes have more great light efficacy, bigger lifetime and coefficient of efficiency. It is offered a broad assortment of the light-emitting diodes by color temperature, radiated power and viewing angle.
The common disadvantage of the fluorescent lamps and light-emitting diodes is a fact, that these indicators are just only the point light sources. With the assistance of them we can't provide the sufficient uniformity of the light flux for the large areas. Besides that, it is not recommended to install them to some indicators (for example – street clocks, street thermometers, electric price tickets), which work in the sunbeams' direct hit conditions. The small viewing angle of the bright light-emitting diodes (30?90°) can also decrease the audience of their influence and make some limitations for their dispositions.

Neon's disadvantages:
  • high cost, especially for the permissible quality;
  • problems with maintainability;
  • the lower brightness than in the fluorescent lamps.

Advantages of the fluorescent lamps


After the analysis of these things, in one's time, we decided to create the lightdynamics on ordinary fluorescent lamps with hot incandescence, taking into account such rather positive characteristics of the fluorescent lamps as:

  • big area of the illumination and a sufficient uniformity of the light flux;
  • high light efficacy (70?100 lumen/watt);
  • large lifetime (15000?20000 hours);
  • broad assortment by shapes and measurements of fluorescent lamps;
  • standardization of lamps, and so rather good maintainability of these devices by standard replacement of these lamps in a standard adapter;
  • wide popularity in the light outdoor advertising.

Ways of the power supply for the fluorescent lamps


There are two basic methods of supplying for the fluorescent lamps: throttle ballasts supply and electronic ballast supply (i.e. electronic starting up control devices).

Electronic ballasts can:

  • provide a light-secured start (without any flickers and noises), especially at low temperature conditions;
  • prolong the lifetime of the lamp on 50% owing to the sparing environment (especially of the start mode), and therefore decrease the operational costs for the lamps' replacement (the cost of the lamps, the cost of their utilization and the cost of their replacement);
  • save the electric power;
  • provide the high quality of the electric energy input.

However, the ordinary electronic ballasts aren't oriented for very rapid and frequent lighting/fading of the lamps. Even the best original ballasts of the lead companies would give you the warranty only for 250?300 thousand lightings/fadings for your lamps. Besides that there is a problem of the simultaneous lighting/fading for several lamps with the obligatory saving of the preparation mode of the lamp switching. All these problems rendered impossible the creating of the lightdynamics with the assistance of the fluorescent lamps with a hot incandescence. Therefore we created and investigated new methods of control the fluorescent lamps. There were taken lengthy experiments for selecting the optimal method. We developed special devices - the dimmer electronic ballasts (DEB), and investigated these devices regarding for the optimal customization mode and, at last, we implemented some specific projects, which showed the ability of a practice implementation and confirmed a big efficacy of the lightdynamic devices, which use the fluorescent lamps.

Technical and economic assessments


The usage of our devices for supply the fluorescent lamps in comparison with a standard inductor supply provides:

  • higher efficacy of the lightdynamic advertising;
  • saving of the electric power.

The usage of our devices for supply the fluorescent lamps in comparison with a standard electronic ballasts of a proper quality provides the lightdynamics for the proper prices.

We'll show you the analysis of two modes of the supply (the inductor and the electronic ballast supply) and you'll see the efficacy of DEB. This analysis will show you the advantages of this supply just only in the view of an electric power saving.

The usage of DEB for supply of the fluorescent lamps provides the electric power saving due to:

  • improvement of the lamp's efficiency at high frequencies o 25?35%;
  • decreasing of the electric power use, owing to dynamics (it depends on the algorithm of the lamp operating; we'll take kdyn=0,5 );
  • decreasing of the electric power use owing to increasing cos j from 0,55 for the case of an inductor supply till 0,95 for the case of DEB supply (modern electric power counters consider not only active, but also the reactive component).

Input data:
  • 4x36 W variant;
  • the cost of the electric power for factories – RATE=0,05$/kW;
  • the cost of the inductor – Cind=3$;
  • the cost of the starter and his adapter – Cst=1$;
  • electric power save owing to dynamics - kdyn=0,5;
  • electric power save owing to improvement of the lamp efficiency – keff=0,75;
  • work-time of the light-box for 24 hours – T=10 hours;
  • cos j (for inductor) = 0,55;
  • cos j (for DEB) = 0,95

1. Initial costs:
- for DEB: COEB_init=60$;
- for inductor: Cind_init=4*(Cind+Cst)=4*(3+1)=16$.
So, the difference in initial costs is 44$.
Note: the cost of the wires and lamp adaptors is ignored because of their compensating.

2. Electric power saving:
The cost of the electric power for a month (for inductor supply) is:
0,16kW*T*30days*RATE*(2-cosj_ind)=0,16kW*10hours*30days*0,05 $/kW*(2-0,55)=3,48 $.
The cost of the electric power for a month (for DEB supply) is:
kdyn*keff*0,16kW*T*30days*RATE*(2-cosj_DEB)=0,5*0,75*0,16kW*10hours*30days*0,05 $//kW(2-0,95)=0,925 $.
So, we'll have the following electric power save for a month:
3,48 $– 0,925 $.= 2,555 $.

So, you see that the cost difference in 44$ would be recompensed in 17,2 months due to the electric power save. Besides that, the user will have more effective advertising owing to lightdynamics.
Aleksandr Sheremeta
inventor, assignee,  
Ph.D., Associate Professor
UKRAINE, VINNITSA
mobile phone   +38-097-260-61-97
E-mail: ap.sheremeta@gmail.com