Do fluorescent lights give off heat: everything you need to know

Do fluorescent lights give off heat?

People who purchase fluorescent lights might be curious as to whether they emit any heat as well as what kind of heat they can anticipate fluorescent lights to emit.

Because the light is typically associated with heat due to the conventional light bulb.

This article answers more crucial queries about fluorescent lights, including:

How much heat do they produce?

How do they stack up against other types of lighting like LED?

And if they are generally cost-effective.

How do fluorescent lights work?

To generate more light than heat, fluorescent lights require two reactions.

A fluorescent tube’s mercury vapor is first “activated” by the electric current.

After reacting with a phosphor coating to produce visible light, this stimulation generates ultraviolet light.

Fluorescent lights decrease the heat output and use a lot less electricity and emit less heat overall since they don’t rely on a material’s temperature to produce light.

You must think about your options to decide whether to invest in fluorescent light or buy a different type of lighting for your house or office.

Below is a comparison I made between fluorescent light and other types of lighting.

Fluorescent light vs incandescent light

An electric current is used to heat a metal filament until it begins to glow in an incandescent-type light.

This method of producing heat is incredibly temperature-loaded, as you can tell from the process alone.

As a result, fluorescent lights are approximately five times more efficient than incandescent ones and fluorescent lights produce five times less heat for the same amount of electricity used.

In contrast, incandescent bulbs demand more electricity to function.

While an incandescent bulb requires 60 watts of electricity to create 800 lumens of light, a CFL bulb like the Start CFL from GE will use less than 15 watts to produce the same amount of light.

Therefore it’s crucial to avoid comparing the two based on identical electricity usage.

However, since 90% of the electricity used by incandescent light bulbs is used to generate heat instead of light, they are not the most energy-efficient source of illumination.

Although worse than LEDs, fluorescent lights are still preferable to incandescent lights.

Last but not least, because incandescent lights are composed of less expensive materials, they are less expensive.

However, there is only a difference of a few dollars—less than $5.

Additionally, the reduction in your electric cost will pay for it.


Fluorescent lights outperform incandescent-style lights due to their four times reduced heat production and energy needs.

The cost difference between the two types of lighting is not more than $5 per bulb.

As a result, saving money by purchasing incandescent bulbs is not worthwhile because doing so would increase your monthly electric cost.

Fluorescent light vs led lighting

LED stands for “Light Emitting Diode,” and it functions by using the electroluminescence principle.

In terms of both electricity consumption and light output, an LED light is more effective than a fluorescent light.

Furthermore, LEDs run at a temperature that is significantly lower than that of fluorescent lights.

For instance, a 16 Watt LED tube generates 1900 lumens compared to a 32 Watt fluorescent light’s 1800 lumens.

The fluorescent light consumes 32 Watts, of which 28.8 Watts are needed to generate heat.


LED lights outperform fluorescent lights in terms of price, electricity consumption, and operational temperature.

However, because French health experts have issued warnings about potential health concerns associated with LED lights, it is advised to instead purchase dimmer LEDs or regular fluorescent lights.

What is the difference between CFL (compact fluorescent) and fluorescent lights?

If you look for fluorescent lights online, you will find some of the products labeled and marketed as CFL.

These lights are fluorescent and do not use a different working principle.

That is why you should not confuse them with a different light type. 

Compact Fluorescent Lamps, sometimes known as CFLs, are fluorescent tubes intended to replace incandescent lights.

CFL tubes are shorter and arranged so that they are roughly the same size as a regular household bulb, in contrast to fluorescent tubes (which are straight and long).

Are there any other uses for fluorescent lights?

Indoor plants can be grown with the aid of a certain kind of fluorescent light called “fluorescent grow lights.”

Grow lights differ from regular fluorescent light tubes in that they let enough ultraviolet light to accurately simulate natural sunlight.

This aids in the appearance of adequate sunshine, which the plants need to grow.

How much heat do LED light bulbs generate?

They use considerably less energy than incandescent or halogen lamps, nevertheless.

As a result, they produce just a little amount of heat compared to conventional technology bulbs.

Because they produce less heat, LEDs are a better option for task lighting.

They are therefore better suited for lighting up heat-sensitive items, such as food or artwork, that might otherwise be harmed by the heat generated.

Its temperature and the fixture it is placed in depend on the ambient temperature.

Compared to incandescent bulbs, LED bulbs are more heat sensitive.

Because of this, low-cost LED bulbs come with a caution not to install or use them in completely enclosed fixtures.

Do LED lights make a room hotter?

There is so much buzz surrounding LED light bulb efficiency that you start to question if they can heat a space.

And no, that’s not the solution to the query.

Can fluorescent lights make a room hot?

No. because there isn’t much of a temperature increase caused by this kind of light bulb.

These bulbs use fluorescence, a process in which electricity excites mercury vapor to produce short-wave ultraviolet light, to produce visible light.

This ultraviolet light causes a phosphor coating in the tube to glow by activating it.

These light bulbs are more energy-efficient and cooler than regular light bulbs since the fluorescence method only uses 30% of the energy to produce heat.

Does a light bulb make a room hotter?

Yes. However, the amount of heat a single light bulb adds to a space varies on both the size of the space and the light bulb used because different light bulbs produce heat in varying amounts.

Fluorescent bulbs typically emit only around 25% of the heat that an incandescent bulb does.

It follows that the fact that fluorescent lamps only consume 25% of the energy used by incandescent bulbs is not surprising.

Fluorescent light bulbs are thus a wonderful choice if you want to reduce your electricity costs or keep your area cooler.

However, incandescent light bulbs produce more heat.

An inert gas is present in the glass bulbs.

Once the current flows through, the small filament begins to light and heat up.

A fully heated filament can reach temperatures of 4,000°F!

Phosphor in fluorescent lights

Fluorescent lights have some drawbacks that come with their use, even though being more environmentally friendly and less expensive than incandescent lights.

Although they may be preferable to incandescent bulbs, fluorescent lights are not the best lighting solution.

Mercury and phosphor are two hazardous substances found inside fluorescent lamps.

Where to dispose of fluorescent lights?

There are a few locations you might be allowed to take your useless fluorescent lights if your local government restricts their disposal in home garbage cans.

The Home Depot and Lowe’s

They only accept compact fluorescent lights (CFLs).


They also accept CFLs, but you have to bring them to the customer service counter.

Places like “Batteries Plus Bulb”

Accept both fluorescent tubes and compact fluorescent lamps, but they might demand a fee for disposal.


What gives off more heat LED or fluorescent?

Because they don’t take as much energy to convert light to light, LEDs are more effective at catching light.
Higher energy use is associated with incandescent lighting.
CFLs only provide minimal benefit, dissipating 80% of heat.

Do fluorescent bulbs make heat?

Compared to incandescent bulbs, CFL bulbs emit less energy. 10-15% of the energy required for lighting is consumed by incandescent bulbs, with the remainder being converted to heat.
Compared to LED bulbs, CFLs have:
– a longer lifespan
– use less electricity
– and produce temperatures that are 90% lower.

What kind of light bulbs give off heat?

Incandescent lighting produces heat.
There are four distinct types of light-emitting:
– Diodes
– Halogen
– Fluorescents and incandescent bulbs (LED light bulbs).
Depending on the color of the lightbulb, both provide heat in addition to light and are controlled at various levels.

Which light bulbs do not give off heat?

This demonstrates the cost-effectiveness of LEDs.
The advantage of LEDs is that they produce no heat.
Heating is not necessary for the lighting that makes LED lights glow.


Do light bulbs increase the temperature of a room?

The response is “yes,” but only somewhat.

Additionally, it depends on the light bulb because they all produce heat at various rates.

I hope I’ve helped you with this article and now you have the answer to your question: “do fluorescent lights give off heat?”!

Read also: Growing medium for microgreens: which one is the best

Irene Harper

I am a fan of healthy eating, so I studied a lot of information on how to grow microgreens on my own.

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