As I have just learned, Philip USA provides suitable for Earth Day in the past. Sunday should have an LED alternative to the classic 60 W-Light bulb, a service life of 20 years. The lamp base is what and voltage is made for the U.S. market, but the technology is interesting also for the European, the German market in particular. This has prompted me, once to calculate, how meaningful is a such investment. To do so, a critical consideration of the technology comes later.
The lamp consumes only 10 W with a light output of 900 lumens. So, this makes 90 l m per watt. For a warm white LED lamp (temparature of 2700 K), which is already relatively enormous. A life of 30,000 hours is specified in the data sheet. When the above mentioned 20 years ago, that means a use of average 4 hours a day. Cost, the lamp is about $60, which corresponds to €45 at the current rate of about.
Over the life of this lamp would therefore 0, 01 k W * = 30.0000 h 300 k W h consume energy. A traditional incandescent lamp has a service life of approximately 2,000 hours. Thus 15 pieces of this are required so to begin to achieve the same lifetime. This 15-fachen cost let directly lower the high cost of the LED lamp.
The Philip lamp of brightness of conventional 60 W-Lampe is according to manufacturer’s instructions. This would consume about 30.000 h so 1800 k W power. Pure light bulbs are no longer available due to the EU efforts, but I put down a unit price of one euro to the comparability. Bet € 0.20 for the kilowatt hour. Grouped together and continue counting these values will be so:
Purchase LED: €45
Electricity costs LED: 300 k W h * = €0.20 €60
Total cost: €105
Purchase light bulb: 15 * €1 = €15
Electricity costs: 1800 k W h * € 0.20 = €360
Total cost: €365
Saving LED: €260
The actual total costs over the life of so much lower fail LED for that – they amount to less than one-third. The saving is € 260 per replaced bulb. Financially, this lamp is a no.-brainer so, in practice, I see but still have a few little problems with it.
First there is the enormous Purchase price for something so simple as a light bulb. As is clear from a comment of a Redditors worked in retail, consumers not always rationally decide. To keep the lamp 20 years does not justify often that a conventional light bulb is so much cheaper at first glance. The hidden costs of (multiple acquisition, higher energy consumption) are ignored like in the supermarket. Here the question arises, whether a complete LED light fixture not labor would be. Finally, there is for in roughly the same money a whole lamp and not just a bulb.
Still, the one-time cost is enormous, if you decide to convert the entire House on LED technology. For example 10 bulbs, €450 incurred so abruptly. Who’s for €450 lying around for “Lamps”?
In addition also still a problem I have with the technology in General. The LED development in recent years was so enormous, that I can convince bin, that it doesn’t take long until even this lamp is obsolete. Therefore, I think it so for very questionable whether this bulb would be really 20 years in the same version. Just when the technology becomes cheaper, premature replacement may would be even economically useful.
Overall, I would therefore say technology is indeed impressive, the savings compared to the conventional technique enormously, but this lamp is not revolutionary. At least not at the current price. It remains to be seen, how much the price will drop in the near future.