Comparison of the efficiency of KRAFT Led lamps and LED panels

Analysis of LED test reports and KRAFT LED profile

KRAFT has ordered tests of the KRAFT LED profile and the popular model of LED panels. Tests were carried out by the “Science and Information Center of the Viprobuvan Electric Lamps and Technological Ownership”.
DP "Poltavastandartmetrologіya" ". Test results can be verified by test report number. Test report KRAFT LED 09.1-4476Test report LED-panel 10.1-4766

Below we compare the test results for the main parameters and simulate the calculation of the lighting of a shopping center with an area of ​​1000 m2 (room size is approximately 32x32 m).

Test Report 09.1-4476
LED panel
Test Report 10.1-4766
Measurements and elucidation
1. Nominal power, W
29,3 36,6 Rated power of the appliance. Rated power of the appliance. Calculation of total power including active and reactive electricity, see clause 8. 
2. Amperage, A
0,135 0,311 Amperage is used to calculate full power including active and reactive electricity, see clause 8
3. Power factor, cos φ
0,99 0,53 Active power is spent on useful work. Jet electricity is a part of full power that is not spent on useful work. The closer the magnitude cos φ to 1, the better.
4. Light flux, Lm
3217 2064 The higher light flux number the more light you get from lighting device. 
5. Light output, Lm/W
109,8 56,4 Light output is the ratio of the light emitted by the light source to the power consumed by it. It is an indicator of efficiency and economy of light sources.
6. Color temperature, K
4772 7101 The color temperature is responsible for the shade of light. Normally three shades are distinguished: warm (≈2700-3000 K), neutral or white (≈4100 K) and cold (≈ 6500 K).
7. Color transfer index, Ra
81,9 73,7 The higher Ra index, the more natural will look lighted objects. Maximum Ra — 100 (sun).
Ra from 70 to 79 is good. Ra from 80 to 89 — very good.
8. Full power taking into account the power factor  cos φ, VА
29,7 68,4 The total power of the lamp is calculated by the formula:
P = UI,
where Р — total power (Вт), U — voltage (В), I — current strength (A). The voltage at test was 220 V. The current strength is subtracted from item 2. For KRAFT LED:
P = 220 × 0,135 = 29,7
For the LED panel:
P = 220 × 0,311 = 68,4
9. Warranty, Years
3 2 The warranty period for KRAFT LED is one and a half times longer.

Comparative calculation* illumination of a shopping center with an area of 1000 m2 *

To facilitate calculations, we assume that  one KRAFT LED kit is used to illuminate 10 m2 of space. At the same time, we must achieve a certain level of illumination.

KRAFT LED LED panel Measurements and elucidation
1. Quantity of kits KRAFT LED and LED panels for 1000 sqm of area.
100 156 The total light flow of 100 KRAFT LED profiles is:
3217 × 100 = 321,700 Lm
Since the light flux of LED panels is 2064 Lm, then to provide the same level of illumination you will need:
321 700 ÷ 2064 = 156 pcs.
2. Total expenses for light
72 000 грн. 77 844 грн. Retail price of LED panel is 499 UAH. Retails price of KRAFT LED kit is 720 UAH. Then we get following expenses:
100 pcs. × 720 UAH = 72 000 UAH
156 pcs. × 499 UAH = 77 844 UAH
3. Mounting costs
7800 грн. LED panel installation price is about 50 UAH/piece:
156 pcs. × 50 UAH = 7800 UAH
4. Total
72 000 грн. 85 644 грн. The cost of buying and installing KRAFT LED lamps is less by about 15-20%
KRAFT LED LED panel Measurements and elucidation
1. Total energy consumption per day, kW
35,64 128,05 We take the average lighting time — 12 hours a day.
For profiles KRAFT LED:
29.7 W × 100 pcs. × 12 h = 35,640 W
For LED panels:
68.4 W × 156 pcs. × 12 h = 128,045 W
2. Total electricity consumption per month, kW
1069 3841 In the month of 30 days
3. Total electricity consumption per year, kW
13 009 46 738 365 days a year
4. The cost of electricity per year (Ukraine)
28 099 грн. 100 956 грн. We calculate the cost based on the tariff of 2.16 UAH/kWh
  +72 857 грн. Due to energy saving, the KRAFT LED lighting system fully recoups for the first year of operation

* The calculations use the average market rates at the beginning of 2018
** ** 100 UAH ≈ USD 3,8 (at the beginning of 2018)


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