For ultra fast reader: 2700K / CRI of> 80/150 ° half-angle / Osram provides the kulantere exchange policy
--- Withdrawable for all who can not do much with the number gibberish ------
Criteria for the selection of retro-fit lamps.
How bright?
The number of lumens indicates how bright the light is. But unfortunately that's not the whole truth.
Depending on the use of the lamp, the results may vary.
Example: A Bulb 500 Lumens distributed evenly in a radiator, but by a reflector most of the light
would like to draw to vorner. Depending on the "Verdrecktheit" of the reflector is in total less light on the front, as for example with an LED (but all forwards) radiates maybe only 400 lumens.
Very strong this effect with LED replacement bulbs for fluorescent tubes. The (normal) tubes radiate in all directions, LEDs (for example) only downward. Where needed, an LED with a lower number of lumens can be quite sufficient.
This bulb has about a half-value angle (ie outside of this range, the brightness by half from 150 °). If the lamp, in which it is to be installed "all-round" light required, this might not be enough. However, the Philips suggests quite well compared to many others.
Light color "I do not want so cold"
Is specified in "K" (Kelvin). Depending nieriger the number, the warmer. 2700K I find very pleasant. 4000K 6000K as borderline and very cold. Unfortunately, "working" the "pleasantness" light color something "against" efficiency. Say, who wants warm light has a small little to do without brightness. Why are many "super bright" LEDs (also flashlights) rather cold in color.
The bulb provides 2700k.
There was one more thing: light quality.
The effect is known: In business, the clothes look different than on the street. Then, lamps have been used with a poor CRI and color rendering index. Everything below 80% (100% = sunlight) should be avoided in living rooms.
The CRI this bulb corresponds to> 80%
Bonus: Read The designation of (compact) fluorescent lamps.
Often we read a three-digit number on the tubes (also compact energy-saving lamps). for example "827" = That is, color rendering index 80% (the "8"), and color temperature 2700K (the "27"). This lamp is good, a 927 would be the greatest feeling. And now it also becomes clear what to make of a hardware store "460" (color rendering 40% 6000K - which one depends Gerde times in the basement).
Dimming
If it is not needed, you should give it up. It requires compromises that make worse rather doubt the lamp.
Power savings
Let us take the replacement of a 60W bulb, the LED (1000h * * 0,29ct 0,051kW / kWh) saves (in 0,29ct / KWh) per 1000h Operating well current 14 euros.
--- End --- withdrawable
For Philips.
What I like: it is not much bigger than an old light bulb and the bulb is virtually no "pause for thought" to immediately and lights (damn close to the bulb) with maximum brightness and are no comic whirring noises.
What I did not like so much (compared to Osram) is more restrictive Philips guarantee culture. Osram exchanged very generous to (details on my blog - just after "Zero Brain zero returns" search). In a nutshell: Osram exchanged with an early defaulters (1000h) to without a sales receipt and refunded the shipping cost, although I had broken the lamps without authorization.
Tip: General information on life. I had breakfast defaulters in several manufacturers (even for large). That's why I like to order the Lamperl here online, so I can verify the purchase date if necessary and shall keep any evidence. Also I write the date and the retailer on the version. You do not believe, as one that rankles when the expensive LED gives up her mind after 1000h.
Why they ever go broke?
Contrary to popular belief, the LEDs burn itself rather hardly or wear out. Anyway, if they are well treated. As a rule, dismantled the electronic control unit and leads to catastrophic failure (until the death of the LED). Currently it is believed that the life hours specified primarily relate to the ballast (in particular, the capacitors are in continuous suspicion here exert lifetime limit).
My Opinion
I buy only when the major manufacturers (this is a subjective list): "Osram, Philips, LG and Samsung Megaman". I send early dropouts back (even though that seems from time to time financially and technically rather questionable). On the one hand enables the companies to improve their Quality warranty, on the other hand is also produced an economic pressure to actually do it. For each failure, the returns, costs several times the earnings of a lamp.
