An advertising surface at a size of 4 x 4 meters shall be illuminated from the roof in a favourable but sufficient way. Such projects so far were lighted with the traditional halogen spotlights from a DIY store. The assembly distances, the size and the number of spotlights mostly were chosen on a gut level. Thus, the equipment for this project consists of 3 cheap spotlights with 500 watts each. However, homogeneous illumination is not a question of the wattage but rather of the right technology.
By experience we know, that such an advertising surface appears to be fully illuminated, if it is spotlighted with 150 lux in average. Based on a computer calculation we have created below illumination chart and determined, that only 1 spotlight out of our product range will be sufficient. This cahrt also can help to find out, that the human eye cannot recognise the inequalities detected by a computer.
Based on this fact, only 150 watts are used now, instead of the 1,500 watts, which were estimated before. The advertising surface is consistently and sufficiently illuminated, as it can be seen on the photo .
The higher costs of the spotlight purchase will be compensated within one year by the lower power consumption. The calculation shows: Within 5 years even more than 3,000.00 EUR in energy costs were saved.
3 regular spotlights each 500 watt
1 spotlight 150 watt from Lichloesung.de
Costs of purchase
90,00 €
470,00 €
Energy costs under the following conditions: 16 cts per kW / H, burning time 9 hours per day, assessment period year 5 years
3.942,00 €
394,00 €
Costs of illuminants within 5 years
96,00 € 1
39,00 € 2
Costs for exchanging the illuminants, if we assume an hourly rate of € 30,00 and 1 hour for each exchange
240,00 € 3
45,00 € 4
Total costs
4.368,00 €
1.005,00 €
1) Price per unit € 4,00, life span 2.000 h as specified by the manufacturer 2) Price per unit € 26,00, life span 8.000 h as specified by the manufacurer 3) Per calculatiion 8 changes within the assessment period 4) Per calculation 1,5 changes within the assessment period
If you also would like to save that much and like to know before the installation whether your advertising surface will be ideally illuminated, just use our [project form] for an inquiry. Further details of the floodlights you will find here.
1) Price per unit € 4,00, life span 2.000 h as specified by the manufacturer
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