Lighting: light output by bulb type

[Christophe]

Here is a recent curve (2007) of the evolution of the luminous efficiency (in lumens / W) according to the bulb technology:

Too bad it lacks the LEDs (especially Luxeon or CREE) but we can see that the compact fluorescents are starting to stagnate: has the technology reached maturity in terms of performance?



It is an extract from this document https://www.econologie.com/telechargeme ... e-energie/ which has a lot of interesting figures, for example, I learned that in terms of energy consumption the discharge bulbs represented the equivalent of incandescent bulbs:



Please note: this does not mean that there are more economical bulbs than conventional ones for private individuals in France because public lighting is included in discharge bulbs.

[chatelot16]

an incandescent lamp does not have a constant output

it very strongly depends on the tension

in 230v 10 volts more increase the output and decrease the lifespan: there are people who have a 230v of the EDF too strong and who burn out the bulbs much too quickly

for allogenes a 12v 50w lamp for car headlight (long life and low efficiency) can become a 24v 200 w lamp for cinema projector: high efficiency but very short life

So you have to know what you want: looking for performance by reducing the lifespan is not necessarily good

[Christophe]

Ah thank you for this remark but are you sure that it really increases the yield in Lumens / Watts?

Would you have a curve like: light output (in Lm / W) / nominal power (in W or%).

With nominal power from 0 to 400% (as your example)?

[Did67]

Too bad it lacks the LEDs (especially Luxeon or CREE) but we can see that the compact fluorescents are starting to stagnate: has the technology reached maturity in terms of performance?

For the boeotian that I am, I see above all that the fluorescent lights are very clearly above the incandescent and that both stagnate ! So I can buy neon without hesitation, there will be no more trend reversal or crossover!

Indeed, a pity that the LEDS are not there.