Using lightbulbs to circulate the air in my room

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Discussion Overview

The discussion revolves around the use of lightbulbs to circulate air in a room, exploring concepts of convection, heat distribution, and air movement without mechanical fans. Participants share personal experiences and propose various methods for enhancing air circulation and drying effects in different environments.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that lightbulbs at varying heights could create convection currents to circulate air.
  • Another participant confirms that warm air rises and implies that lightbulbs can indeed create convection.
  • A different perspective proposes creating a chimney effect with a tube to enhance air movement, suggesting that even a simple structure could facilitate airflow.
  • One participant recounts a personal experiment with a lightbulb and water circulation in a model, noting that it was unsuccessful due to the medium's density and lack of a sufficient temperature gradient.
  • Another participant shares a childhood fascination with motion lamps, linking it to the topic of air movement.
  • A participant mentions using strings of lights on a spiral staircase to create air movement, although the effectiveness was not obvious to others.
  • Concerns are raised about using lightbulbs in a bathroom for drying purposes, questioning the effectiveness of sealing the room and the safety of electrical devices in such environments.
  • One participant warns that while air movement occurs, the radiant energy from lightbulbs may overshadow any cooling effect, suggesting that a fan would be more effective.

Areas of Agreement / Disagreement

Participants express a mix of agreement and disagreement regarding the effectiveness of lightbulbs for air circulation. While some support the idea of using lightbulbs for convection, others question their practicality and safety, particularly in specific environments like bathrooms. The discussion remains unresolved with multiple competing views on the best approach.

Contextual Notes

Participants highlight limitations such as the density of mediums affecting circulation, the need for temperature gradients, and safety concerns regarding electrical devices in humid environments. There is also an acknowledgment that the effectiveness of lightbulbs may be overshadowed by their radiant heat.

questionboy
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If I have lightbulbs at varying heights around the room will the heat push blobs of air around the room and circulate it. Even without a fan or anything blowing.

Like the variance in heat and humidity in my room will make the air travel looking for a more comfortable spot?
 
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Warm air rises, so yes, if you put a light bulb in the room it will create convection.
 
:rolleyes: I think you have to turn it on first. :wink: o:)

Probably best to try to create a chimney effect …

put a tube nearly from the floor to the ceiling (maybe with holes at intervals in the sides), and place a weak heat source beneath it. :smile:

(Of course, if it's cooler outside the room, just run the tube diagonally out of the window, and you won't need a heat source …

even a plank of wood would do: cold air will roll down the topside, and warm air will roll up the underside :wink:)
 
I once tried to do something similar back in high school with a 2 gallon cell model I was making--have water (containing sparkle ribosomes) recirculating throughout the cell using a 100W light bulb shining into the bottom. Didn't really work, which was a shame since I put so much time into it.

In retrospect, the medium was probably too dense and there wouldn't have been a way to create the temperature gradient to get that little water recirculating from the bottom to the top. I probably would've been better off using a propeller or aquarium pump. And in all likelihood, so would you (well, a little ceiling fan, at any rate, unless you're talking a really massive space).
 
TurtleMeister said:
When I was a kid, I was fascinated by motion lamps.
http://www.tvlamps.net/motion_lamps.html

Ah, nice! Thanks, those are great lamps in that link. I think my aunt had one.

I guess now that most lights are compact fluorescent or LCD, these kinds of motion lamps are gone forever...too bad.
 
I know someone who used strings of lights wrapped around a spiral staircase to create the same effect. He insists it worked. The results weren't as obvious to visitors. If there was a downward draft, the stairs probably deflected the flow.
 
what about in my bathroom if i want to dry the room? Keep the lightbulb near the floor.

Should I close the window and doors for greatest effect on drying it?
 
don't put dangerous electrics in a bathroom!

questionboy said:
what about in my bathroom if i want to dry the room? Keep the lightbulb near the floor.

Should I close the window and doors for greatest effect on drying it?

uhh? :redface: the water has to go somewhere

how will the room dry if there's no way out? :confused:

and don't put dangerous electrics in a bathroom!
 
  • #10
By the way...I hope you realize that while it is true that air will move, the cooling effect you will get will be swamped by the radiant energy of the light bulbs. You are much better off with a fan.
 

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