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Energy efficiency light bulb Incandescent. Vector Illustration EPS10 Stock Vector Image & Art - Alamy
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SANSI SANSI 60W Equivalent LED Light Bulbs, 6 Pack 900 Lumens LED Bulb, 3000K Soft White 9W Non-Dimmable, E26, A15 Efficient, Safe Energy Saving for Home Lighting in the General Purpose LED
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5.4 Efficiency Have you ever noticed how hot an incandescent light bulb gets after it has been left on for a while? An incandescent bulb transforms only. - ppt video online download
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