modern energy saving light bulb and old low efficiency |
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navigate by keyword : ancient and antique background bulb bulbs change development dry economic economical efficiency electricity energy environment evolution exchange flooring flowers former heap home house household illumination latterday leaves light lighting lowefficiency maneuver many modern numerous old pile power progress saving sustainability thrift thriftiness transition update upnow vintage white |
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Modern energy saving light bulb and old low-efficiency bulb with flowers on white background. |
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