To calculate the required number of luminaires in the workshop (visual work IVа). The size of the ceiling 60×12 m, height h= 3 m. the distance between the lamps λ= 1,6. Test the illumination of a living room of 20 m2, equipped chetyrehmetrovoy chandelier CFLs 23 watts. The utilization factor η= 0,7, the safety factor, KZ= 1,2; z= 1,1.

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