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✔Fluorescent lamps work by passing electricity through mercury VAPOR, which in turn emits ultraviolet light. The ultraviolet light is then absorbed by a phosphor coating inside the lamp, causing it to glow, or fluoresce. ... High-pressure SODIUM lamps givearound 100 lumens/watt which is very similar to LED lamps.
✔Light-emitting diodes (LED) are semiconductors. As electrons pass through this type of SEMICONDUCTOR, it turns into light. Compared to incandescent and CFL bulbs, LED lights are more efficient at turning energy into light. Therefore, less of the energy RADIATES from the bulb as heat.
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