Understanding Power Consumption of a 4W LED Lamp: Does Usage Duration Matter?

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#31 15978684 07 Oct 2016 12:04

Anonymous Anonymous

Anonymous

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Post #31
15978684 07 Oct 2016 12:04

No matter who the prosumer is. The author of the topic, like the vast majority of household electricity consumers, does not pay for reactive energy consumption, so there is no point in scaring you with such fees.
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#32 16026881 30 Oct 2016 00:41

jmar jmar

Level 12

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Post #32
16026881 30 Oct 2016 00:41

Manufacturers, or rather traders, are deceiving when selling LED lamps. They expose the LED power shamefully hiding the actual power consumed.
Some examples:
ekolight 10 W, current consumption 97 mA - 22.3 W
deck 9.5 W, 83 mA - 19 W
4 W, 41 mA - 9.4 W deck
So, taking into account the actual power consumption and the size of the luminous flux, it is the so-called "energy saving bulbs" are cheaper to run
cbdo
#33 16026906 30 Oct 2016 00:59

freebsd freebsd

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Post #33
16026906 30 Oct 2016 00:59

jmar wrote:
ekolight 10 W, current consumption 97 mA - 22.3 W
deck 9.5 W, 83 mA - 19 W
4 W, 41 mA - 9.4 W deck

Measure this with a wattmeter taking into account the power factor.
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#34 16026914 30 Oct 2016 01:10

jmar jmar

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Post #34
16026914 30 Oct 2016 01:10

Data showing the amount of current consumed in some lamps are given in "fine print" and hence I give them
#35 16026923 30 Oct 2016 01:18

freebsd freebsd

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Post #35
16026923 30 Oct 2016 01:18

This is probably the maximum intensity data. When measuring with a wattmeter, the manufacturer's data usually holds up.
#36 16026934 30 Oct 2016 01:29

jmar jmar

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Post #36
16026934 30 Oct 2016 01:29

I do not have a wattmeter, but taking into account the amount of heat released - the lampholder is hot, the power consumption is probably higher than stated. I can only check with an ammeter
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#37 16027078 30 Oct 2016 08:35

Zbigniew 400 Zbigniew 400

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Post #37
16027078 30 Oct 2016 08:35

In LEDs, about 20% of the energy consumed goes into heat, no wonder. With a power of 10W, this gives 2W. Take a 2W resistor, power it with 2W and take it to the handle.
Look at the LED floodlights that the housing has a heat sink.
#38 16027665 30 Oct 2016 12:57

Darom Darom

Electrician specialist

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Post #38
16027665 30 Oct 2016 12:57

Zbigniew 400 wrote:
In LEDs, about 20% of the energy consumed goes into heat, no wonder.

I am not a lighting specialist, but in my humble opinion, in LEDs currently used in lamps, at least 60% of electricity goes into heat (in incandescent lamps it was 96%). So their efficiency is about 30-40%. Some "quinols" have an efficiency of around 20% (80% goes to heat). Of course, there are laboratory solutions where the efficiency exceeds 50%, but they are not yet used in commercial solutions.

jmar wrote:
I do not have a wattmeter, but taking into account the amount of heat released - the lampholder is hot, the power consumption is probably higher than stated. I can only check with an ammeter
If you don't have a wattmeter, just an ammeter, don't mislead people.
And the tube will be hot anyway - we have several energy transformations, each with some efficiency.
- electricity in the CCD power supply
- electricity in photons in the LED itself
- phosphor (wavelength conversion in a phosphor).
Most of the energy goes to heat the house anyway than to light it.

kisses
- GIFT-
#39 16028225 30 Oct 2016 16:35

Anonymous Anonymous

Anonymous

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Post #39
16028225 30 Oct 2016 16:35

jmar wrote:
I do not have a wattmeter, but taking into account the amount of heat released - the lampholder is hot, the power consumption is probably higher than stated. I can only check with an ammeter
If you don't have a wattmeter, you won't measure active power. How can you give 22W power on the basis of a hot frame? Unless you have an accurate wattmeter in your fingers.
#40 16028297 30 Oct 2016 17:07

kkknc kkknc

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Post #40
16028297 30 Oct 2016 17:07

I once bought 10W floodlights in Juli. The power consumption after stabilization was about 10W.
#41 16028310 30 Oct 2016 17:11

retrofood retrofood

VIP Meritorious for electroda.pl

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Post #41
16028310 30 Oct 2016 17:11

kkknc wrote:
I once bought 10W floodlights in Juli. The power consumption after stabilization was about 10W.

Since when did the watt become a unit of current?
#42 16028426 30 Oct 2016 18:01

kkknc kkknc

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Post #42
16028426 30 Oct 2016 18:01

Hunter abbreviation. The current consumption was about 43mA. And the author can count the power without any problems.
#43 16029005 30 Oct 2016 21:11

Darom Darom

Electrician specialist

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Post #43
16029005 30 Oct 2016 21:11

kkknc wrote:
Hunter abbreviation. The current consumption was about 43mA. And the author will count the power without any problems.
And the next culprit who can calculate the active power from the value of its intensity using alternating current.

kisses
- GIFT-
#44 16029085 30 Oct 2016 21:43

retrofood retrofood

VIP Meritorious for electroda.pl

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Post #44
16029085 30 Oct 2016 21:43

Darom wrote:

kkknc wrote:
Hunter abbreviation. The current consumption was about 43mA. And the author will count the power without any problems.
And the next culprit who can calculate the active power from the value of its intensity using alternating current.

And everyone who uses "mental shortcut" thinks that it is a trifle, not worth mentioning. And less than a year ago, it was all described, we wrote about apparent, active, reactive and distortion power, someone even posted oscilloscope waveforms and ...? Nobody wants to find it, although many say "specialists".

You will have to live a little longer to make at least a few heirs aware ...
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#45 16029136 30 Oct 2016 22:00

kkknc kkknc

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Post #45
16029136 30 Oct 2016 22:00

Darom wrote:

kkknc wrote:
Hunter abbreviation. The current consumption was about 43mA. And the author can count the power without any problems.
And the next culprit who can calculate the active power from the value of its intensity using alternating current.

kisses
- GIFT-

Can 235VDC, 43mA, cos? 0.7,45 ° which gives 10.1VA, 7.1W and 7.1VAR
I can round more precisely. But that's probably enough for that.
To count with other factors? Do these typical colleagues satisfy?
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Topic summary

The discussion centers around the power consumption of a 4W LED lamp, specifically whether it truly consumes 4W continuously or if there are conditions similar to fluorescent lamps that affect its efficiency. Participants clarify that a standard 4W LED bulb, such as those with E14 or E27 fittings, typically draws the specified power without significant initial surges. Some users note that while the LED may consume 4W, the actual light output can vary, with some claiming it can replace higher wattage halogen bulbs. Concerns about light diffusion and the efficiency of LED technology are also raised, with suggestions to look for SMD LED designs for better light scattering. Additionally, the conversation touches on the importance of understanding power factors and the actual power drawn from the mains, especially in relation to different types of LED lamps and their power supplies.
Summary generated by the language model.