Benutzer:Rdiez/BuyingALightBulb

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Buying a light bulb used to be easy

Buying a light bulb used to be really easy, but that changed with the arrival of energy-saving models. Here is a feature list:

• Brightness.
  Unfortunately, the lumen values are not linear, especially from 2,000 Lumen. I don't know the maths. If you can help, please drop me a line. This is the table I have been using for reference:

Incasdencent Watt	Lumen	LED Watt	Energy-saver Watt
40	400	8
60	720
80	1,000	20
100	1,200
150	1,700
200	10,000

• Color temperature. 2700K is best. 3000K might be described as "soft, warm white", but you'll notice the difference.
• Turn-on speed.
• Lifespan.
• Cycling endurance.
• Clear or frosted glass.
• Noise.
• Dimmable.
• Physical robustness.
• Operating temperature.