12.) In terms of efficiency electric cost and purchase price , compare Incandescen lights to Fluorescent lights.

Let's compare incandescent and fluorescent lights in terms of efficiency, electricity cost, and purchase price:<br /><br />**Efficiency:**<br /><br />* **Incandescent:** Very inefficient. Only about 10% of the electricity used is converted to visible light. The rest is lost as heat.<br />* **Fluorescent:** Much more efficient. Around 60-80% of the electricity used is converted to visible light. They produce much less heat.<br /><br />**Electricity Cost:**<br /><br />* **Incandescent:** Higher operating costs. Because they are inefficient, you use more electricity to produce the same amount of light, leading to higher bills.<br />* **Fluorescent:** Lower operating costs. Due to their higher efficiency, they use less electricity for the same light output, resulting in lower electricity bills. The savings can be significant over time.<br /><br />**Purchase Price:**<br /><br />* **Incandescent:** Generally cheaper to buy initially.<br />* **Fluorescent:** Typically more expensive to buy upfront than incandescent bulbs. However, compact fluorescent lamps (CFLs) and especially light-emitting diodes (LEDs, which are even more efficient than fluorescents) have come down in price considerably.<br /><br />**Summary Table:**<br /><br />| Feature | Incandescent | Fluorescent |<br />|----------------|-------------------|--------------------|<br />| Efficiency | Very Low | High |<br />| Electricity Cost | High | Low |<br />| Purchase Price | Low | Moderate (decreasing)|<br /><br /><br />**Conclusion:**<br /><br />While incandescent bulbs have a lower initial purchase price, fluorescent lights (and even more so, LEDs) are a much better long-term investment due to their significantly lower energy consumption and therefore lower operating costs. The higher upfront cost is quickly offset by the energy savings.<br />