IWA 02114 Trilux Special LIghting Slide Rule

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Country of manufacture: Germany,            Date of manufacture: ____
Overall length: 30.1 cm,          Width: 5.0 cm,           Weight: 63.7 gms
Materials: all plastic
Cursor: 4.0 X 4.3 X 0.3 cms; all plastic;     lines = two lines on front
Scales: 8
Front: 28 cm // E_m (average horizontal illuminance in Lux) [ η_B (lighting efficiency), Φ_Lp (luminous flux of a lamp in Lumens), A (area of room in m² ) ] n (number of lamps), Φ_tot (total luminous flux in Lumens) \\ 14 in
Back: lighting efficiency levels for various fluorescent light luminaires
Gauge Marks: [      ]
Condition: C4 (Minimum Signs of Use)
Came with: Clear plastic slipcase, instruction card

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