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| − | {{BenutzerSeitenNichtVeraendernWarnung|rdiez}}
| + | #REDIRECT [[Benutzer:Rdiez/PageRemoved]] |
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| − | = Buying a light bulb used to be easy =
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| − | Buying a light bulb used to be really easy, but that changed with the arrival of energy-saving models.
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| − | It is very hard to buy a quality light bulb. I have often bought from "good" brand names and got disappointed.
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| − | Here is a feature list:
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| − | * Brightness. <br/> Unfortunately, the lumen values are not linear, especially from 2,000 [http://en.wikipedia.org/wiki/Lumen_%28unit%29 Lumen]. I don't know the maths. If you can help, please [[Benutzer:rdiez|drop me a line]]. This is the table I have been using for reference:
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| − | :{| {{prettytable}} class="wikitable"
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| − | ! title= |Incasdencent Watt
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| − | ! title= |Lumen
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| − | ! title= |LED Watt
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| − | ! title= |Energy-saver Watt
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| − | ! title= |Halogen Watt
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| − | ! title= |Col temp
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| − | |-
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| − | | 40 W
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| − | | 400 lm
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| − | | 8 W
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| − | |-
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| − | |
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| − | | 480 lm
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| − | | 5 W
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| − | |-
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| − | | 60 W
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| − | | 720 lm
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| − | |-
| + | |
| − | | 80 W
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| − | | 1,000 lm
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| − | | 20 W
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| − | |-
| + | |
| − | | 100 W
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| − | | 1,200 lm
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| − | |-
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| − | | 150 W
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| − | | 1,700 lm
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| − | |-
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| − | | 1,900 lm
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| − | | 23 W
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| − | | 3200 K (too cold)
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| − | |-
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| − | | 2,700 lm
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| − | | 28 W
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| − | | 3000 K (a little too cold)
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| − | |-
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| − | | 2,800 lm
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| − | | 30 W
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| − | | 3000 K (a little too cold)
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| − | |-
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| − | |
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| − | | 3,000-3,250 lm
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| − | | 160 W
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| − | | 2800-2900 K (warm)
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| − | |-
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| − | | 200 W
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| − | | 10,000 lm
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| − | |}
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| − | * Color temperature. 2700K is best. 3000K might be described as "soft, warm white", but you'll notice the difference.
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| − | * Turn-on speed.
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| − | * Lifespan.
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| − | * Cycling endurance.
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| − | * Clear or frosted glass.
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| − | * Noise.
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| − | * Dimmable.
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| − | * Physical robustness.
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| − | * Operating temperature.
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| − | == Compact fluorescent lamp (CFL) ==
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| − | I am particulary dissatisfied with [http://en.wikipedia.org/wiki/Compact_fluorescent_lamp compact fluorescent lamp (CFL)] technology, especially after all the hype.
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| − | Its many drawbacks are:
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| − | * Expensive.
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| − | * Slow to turn on.
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| − | * Often last much shorter als advertised, due to low cycling endurance.
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| − | * Noisy. Most CFLs make a humming noise that you may notice in a quiet environment.
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| − | * Cold light colour.
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| − | * Normally not dimmable.
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| − | * The light bulb itself is also ugly.
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| − | * Contain toxic mercury (quicksilver) which complicates their disposal.
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| − | * They turn darker with time.
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| − | On the bright side, they consume very little electricity.
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| − | == LED lamp ==
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| − | LED lamps have a few drawbacks:
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| − | * Expensive.
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| − | * Weak. I just cannot find powerful LED lamps. The ones I see around are too weak for the living room.
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| − | They win in every other category.
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| − | == Halogen lamps ==
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| − | Advantages:
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| − | * Cheap.
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| − | * Fast to turn on.
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| − | * Bright.
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| − | Drawbacks:
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| − | * High electricity consumption compared to CFLs or LEDs.
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| − | * They lose a lot of brightness with age (see 'cooking' below).
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| − | * Dimmable, but you often get a hummy noise when dimmed from the power supply.
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| − | * They get very hot, so:
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| − | ** They tend to turn darker (they 'cook') with time.
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| − | ** If you touch one during operation, you'll get burnt.
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| − | ** Careful when cold too. Fingertip oil may make them even hotter and damage them.
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| − | * Some halogen bulbs shed a cold light (colour temp 3000 K or higher).
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| − | == Fluorescent tubes ==
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| − | Pros:
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| − | * Cheap.
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| − | * Powerful.
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| − | * Consume little electricity.
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| − | Cons:
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| − | * Big, long.
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| − | * The starters break down often.
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| − | * Cold colour.
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| − | * Slow to turn on.
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| − | * Poor cycling endurance.
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| − | * Humming noise.
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| − | * Not dimmable.
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| − | * Brittle.
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