Why do we call a zero watts bulb as it so?

  • Thread starter Thread starter Srini karthik
  • Start date Start date
  • Tags Tags
    Bulb Watts Zero
Click For Summary

Discussion Overview

The discussion revolves around the concept of "zero watts" bulbs, commonly referred to as night lamps. Participants explore the implications of labeling a bulb as zero watts, questioning whether this indicates zero current or voltage, and discussing the power consumption of modern LED and fluorescent lamps.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • One participant questions the terminology of "zero watts" and its implications for current and voltage in such bulbs.
  • Another participant states that night lights in their area typically consume around 4 watts, suggesting that the term "zero watt" may not be accurate.
  • A participant speculates that the term "zero watt" might be a marketing strategy, arguing that the actual power consumption is low enough to round to zero, using an example of an LED's power calculation.
  • There are references to marketing practices in other industries, such as soft drinks and tobacco, where similar rounding tactics are employed to present misleading information.
  • Some participants express skepticism about the possibility of achieving light without power consumption, emphasizing that all lights draw some power.
  • One participant mentions the regulatory aspects of advertising that may contribute to the use of misleading terms like "zero calories" in food products, drawing a parallel to the bulb discussion.
  • There is a recurring theme about the fine line between marketing and dishonesty, with participants reflecting on how consumers may be misled by such claims.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the validity of the term "zero watts" for bulbs. Multiple competing views are presented regarding the accuracy of the term and its implications for power consumption.

Contextual Notes

Participants express uncertainty about the definitions and implications of "zero watts," and there are unresolved questions regarding the actual power consumption of various types of bulbs.

Srini karthik
Messages
13
Reaction score
0
why do we call a zero watts bulb as it so??

a zero watts bulb is common in houses,commonly called as 'night lamp'.., if v say it as zero watts lamp., then is it conducts zero current or zero voltage?
what is the power consumption by modern led lamps and by other fluorescent lamps??
 
Engineering news on Phys.org


I have never heard of a zero watt bulb.

Night lights around here use as much as 4 watts.
 


i'm going to guess it's another dishonest marketing ploy.
the wattage is a small enough that it rounds to nearest integer value of zero.

take for example a 30 milliamp LED that drops 3.5 volts

it'll dissipate 3.5 X 0.03 = 0.105 watt.

Nearest integer is zero.

Int(0.105) = 0.

the capacitor that sets current dissipates no power.

There's probably a current limiting resistor inside , maybe another 0.1 watt there.

Put you hand around it. If you can feel ANY warmth it's not zero watts.
If it were zero watts it couldn't make any light.

such marketing is an insult.


old jim
 


Soft drink companies discovered that trick long ago. By reporting calories by serving (usually extra small servings) and rounding, diet soft drinks can have zero calories.

I'm surprised tobacco companies never picked up on that. They could probably say truthfully, "Each cigarette has zero grams of tar or nicotine."
 


skeptic2 said:
Soft drink companies discovered that trick long ago. By reporting calories by serving (usually extra small servings) and rounding, diet soft drinks can have zero calories.

I'm surprised tobacco companies never picked up on that. They could probably say truthfully, "Each cigarette has zero grams of tar or nicotine."

And anyone with any sense and even minimal knowledge of chemistry would know that "0 Calories" is pretty much impossible for any food product. It doesn't make any sense at all.

"4 out of 5 X..." and it's big brother "9 out of 10 X..." are overused to the point of cliche, but despite being spoofed in ads now, it'll never go away because people suck at statistics and anything remotely scientific. They know it and take advantage of it.

There's a fine line between "marketing" and "lying", just fine enough for marketers to ignore it and feign ignorance. (Or worse, even when caught red-handed in a bald faced lie, "free speech")
 


You don't get light for no power. Even the LED that I use for night night draw power.
 


It's pedantery on behalf of either the vendors, the legislative requirements for advertising these things, or a combination thereof.

It's a bit like a peperoni sausage snack sold here in UK called 'peperami': Its ingredients include 150% pork!

(The regulations stipulate that %age content listed is; mass input of ingredients/mass of product. As peperami is made from dried pork, so it weighs less than the pork ingredients that went in.)
 


Jiggy-Ninja said:
And anyone with any sense and even minimal knowledge of chemistry would know that "0 Calories" is pretty much impossible for any food product.
Well, pretty sure Diet Cola is composed of nothing metabolizable. OK, I guess the few mg of colouring and flavoring might count form something.

Jiggy-Ninja said:
There's a fine line between "marketing" and "lying"...
There's a line? :-p
 


well! it's the gimmick used in sme places..,
 
  • #10


Jiggy-Ninja said:
And anyone with any sense and even minimal knowledge of chemistry would know that "0 Calories" is pretty much impossible for any food product. It doesn't make any sense at all.

They don't say 0.00 Calories or even 0.0 Calories, they're saying 0 Calories - 1 significant digit. Now if they said 0 calories, there may be an issue.
 

Similar threads

  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 5 ·
Replies
5
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
4K
  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 18 ·
Replies
18
Views
7K
Replies
5
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 11 ·
Replies
11
Views
4K