Re: Re: Fotovoltaico, auto elettriche e autonome, eolico ¶
By: lmwillys1 on Sabato 11 Dicembre 2021 10:19
To measure the luminous flux of a light source you have to consider the surface of the light source, and the measurements of UNIBO has indicated it. Besides, 1 LX = 1 LM/ m^2, therefore the same flux focused on 1 cm^2 is 10000 LM
Remake the math.
in Ecat.com you say that “the Ecat SKLed is a compact LED-based lamp with a luminosity of a 100W LED lamp”, that is SKLed should produce light 25 times more than a standard LED-based lamp. But in your today’s presentation the ecat SKLed measurements indicated 167 lux versus 900 lux of a 98 watts standard LED lamp. That is, the SK Led lamp comsuming 4 watts is “only” about 5 times more powerful of an ordinary 100 watt LED lamp. This is a very good performance, anyway, but … can you explain better the difference with the statement in ecat.com?
in the presentation we did not compare the power, but the efficiency
Hi Andrea, you showed the lux measured instead of lumen this kind of value doesn’t matter nothing about the efficiency of a source, why this measurement?
because lux are directly measured by the instrumentation; since the ratio between LM and LX is linear with the power, we wanted just to show the different efficiency of the lamps, with constant angle and surface of the light source
Dear Dr. Rossi, in the description of the SKLed you describe that the SKLed produces the same amount of lumens as a 100W standard LED. However, in your presentation, SKLed has 167 lux versus more than 800 lux for the 100 W standard LEd. Can you explain this? Thank you very much.
The efficiency is given by LX/W