If the Blowtorch has no blue power on LED, it can't be high end. Just ask the Chinese, I think their toilets have blue LEDs.
Blue is horrible in LED indicators far to bright and distracting, white is OK if its not blinding, but green and red are my favourites...
As an analogy : life expectancy of a diesel engine is pimarily governed by the average piston speed. Second factor is the power rating, a higher turbocharged engine with identical max continuous rating rpm has a shorter longevity.
White and blue LED's have a short wavelength => high energy.
High energy => higher rating => shorter life expectancy.
Decremental steps are nominally larger than long wavelength LED's as e.g. RED lightning, aka visually fade away much faster.
I have a device with red LED's which has been running 24/7 for 3 decades, 265k hours minus a couple of bridge&dumpster adress switches.
Without a measurement, I can't honestly tell if half-life has been reached.
Yours truly, dr J Hick.
I have to start getting used to adressing you as Mr. Mr. Russell, Mr. Russell.
Although if you read Ricardo he points out that mean piston speed is fairly constant from RC engines down to cathedral diesels.
My oldest LED is probably the channel indicators in a Quad FM4 tuner.
Might be getting close to 30years old and never a problem with any of the green LEDs.
stays on 24/365 and most of the time shows station 5 LED, probably approaching 100000hrs.
Green LED's have a wavelength inbetween white and red, but low forward voltage.
Life according to hick would assume a green LED has an average life expectancy : a greenie beats a blue meanie, but loses from burning chili peppers (red+yellow).
Life according to hick would assume a green LED has an average life expectancy : a greenie beats a blue meanie, but loses from burning chili peppers (red+yellow).
Please excuse my current bad temper, Mr Marce.
Afaig, a white LED basically is a blue meanie on meth.
Does a white LED have a wavelength ? (white light isn't a color, but a mix of illegal refugees)
But I get your point.
Afaig, a white LED basically is a blue meanie on meth.
Does a white LED have a wavelength ? (white light isn't a color, but a mix of illegal refugees)
But I get your point.
the 5th of 8 might only be on for 30% to 50% of the total ON time and maybe some unknown Tuner OFF time.
Sorry couldn't resist...
On a more serious note, when I thought about it, I would presume its a broad spectrum of wavelengths that excite our S M and L receptors.
On a more serious note, when I thought about it, I would presume its a broad spectrum of wavelengths that excite our S M and L receptors.
I thought that blue and white LEDs were more likely to be UV LEDs with a range of visible light phosphors to give a mixture of discrete wavelengths that together mimic whitish light.
Much like colour television and fluorescent tube.
Much like colour television and fluorescent tube.
The logic of 100k escaped me.
(you're the principal advocater of accurate English on English forums/fora/fore/fori)
I support attempts to write accurate technical english on a technical Forum.
Otherwise we are left guessing at what ambiguous statements might mean.
Spelling errors can be excused, lack of english due to being a non native language is excused.
gobble de gook written to save time can never be excused.
white LED are often visible blue with just 2 extra phosphors to make white
but the blue can be annoyingly shorter wavelength than needed by the eye
in bias operation the LED can be operated way below the rated current that the nominal life is given for
but the blue can be annoyingly shorter wavelength than needed by the eye
in bias operation the LED can be operated way below the rated current that the nominal life is given for
Ten year anniversary of the two Blowtorch treads coming up this January.
7th January 2006 . . .
- Status
- Not open for further replies.