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Semi-indirect lighting with a new unit practical for any purpose : that is more efficient than any other lighting unit on the market (1920)
Luminous Unit Co. · Luminous Unit Co. · leaf 22
- installation. They are approved by theNational Board of Fire Underwriters. THE LUMINOUS UNIT COMPANY 2615 Washington Avenue ST. LOUIS, MO. I <Electrical engineering · Lighting · Interior lighting · Lighting Fixtures
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