Geek magazine hacker daily blog

Decrease in brightness when heating at LED lamps

1 year, 7 months ago
Testing LED lamps I found in them one feature. Practically at all lamps brightness decreases after warming up.



In 5-30 minutes after inclusion the luminous flux of lamps decreases by 11-12%. When the lamp got warm, its brightness does not change any more.

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LED lamps X-Flash

1 year, 7 months ago
Recently I told about the smart LED lamps able to join automatically at approach of twilight, to change the color temperature 3000/4000K, to set one of three brightness levels or to smoothly change brightness without dimmer. Today I will tell about normal LED lamps of this brand.



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LED lamps from shop Lerua Merlen

1 year, 8 months ago

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LED lamps from shop Auchan

1 year, 8 months ago
The majority of LED lamps which I test and about which I write can be purchased only in specialized online stores, however normal buyers as a rule buy lamps in hypermarkets. I went to shops Auchan and Lerua Merlen, purchased 48 models of LED lamps there and tested them. Returned lamps back to shops as there is a possibility of return. From Lerua Merlen I will tell about lamps next time, today — 22 lamps from Auchan.


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Start of 7 W — a LED lamp from "Pyaterochka" and "Dixie"

1 year, 9 months ago
In Pyaterochka and Dixie shops over all country the only model of a LED lamp — Start of 7 W is on sale. It costs about 270 rubles.



I purchased and tested this lamp.

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Glow lamps and tension in a network

1 year, 9 months ago

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Dimmirovaniye of LED lamps

1 year, 9 months ago
For brightness control of glow lamps the dimmer — the simple electronic device changing lamp brightness due to "trimming" of part of a sinusoid of mains voltage was very long time ago invented.

The glow lamp is simple, and the LED lamp contains the complex electronic circuit therefore with a dimmirovaniye there everything is difficult. Today I will tell what is done by dimmer, than they differ among themselves and as dimmiruyemy LED lamps in comparison with glow lamps at brightness control behave.



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LED lamps candles of Gauss of new generation

1 year, 9 months ago
The first lamps of Gauss got to me for testing one and a half years ago. The majority of them had not really high color rendering index of CRI (72.8-75.7), and dimmiruyemy "candle" strongly flickered.

In new generation of lamps of Gauss these defects are eliminated — lamps have low ripple ratio of light and rather high CRI.

Recently I told about a powerful 12-watt lamp equivalent of the 100-watt glow lamp, today I will tell about three lamps candles with E14 socle.



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Russian LED lamps

1 year, 10 months ago
The vast majority of LED lamps are made in China, however in Russia there are several vendors collecting bulbs in our country and one of them also itself makes LEDs.

One of my readers brought to me five lamps of three Russian vendors.



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Secret devourers

1 year, 10 months ago
I turned off the light, the computer "lulled", pulled out the refrigerator from the socket and looked what consumption of electricity shows the counter.



80 W. These are 700 KWh a year for which it is necessary to pay up to 3525 rubles!

In any modern apartment the network constantly included a set of the devices working in standby condition. Though they are also switched off, these devices consume a little energy, necessary for inclusion from the panel or the button.

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