FIELD: lighting.
SUBSTANCE: invention related lighting engineering and can be used in lighting devices design. Lighting diodes in every i-chain to be chosen by to their straight voltage, according to ratio (1): 
where 
- real straight voltage value of j-lighting diode from i-chain at current Ip and predetermined temperature value (Tp); UFM - straight UF voltage maximum accepted value for light diodes type, used in lighting device, at current Ip and temperature Tp; ΔUc - design value, real straight voltage value smaller then n·UFM- not less than ΔUc. All the stabilisers has maximum value of efficiency factor (EF) at output voltage value (Uout), satisfying correlation (2): Uout0 - ΔUp ≤ Uout0 + ΔUp, (2) , where Uout0 - stabiliser output voltage value, which equal to n·UFM-ΔUc; ΔUp ,where ΔUp predefined maximum accepted deviation real value Uout of stabiliser, at which it has maximum EF, from Uout0.
EFFECT: luminous efficiency increase of lighting device based on light diodes.
2 dwg
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