LED are essentially current devices with the light output having a direct correlation to the amount of current flowing thru the device. More current, more light: Less current, less light. It's interesting to note that if overdriven, the increase in power will result in a much shorter life. I know as I miscalculated the resistance value on a bunch of LED sometime back.
Most of the LEDs I'm using have a series resistor build-in the LED packaging to allow higher voltage operation. Might be helpful to also note that LEDs come in several flavors in terms of the lens on the device. I have been using LEDs with an inverted lens for application requiring more diverse light for example. Andy From: [email protected] [mailto:[email protected]] On Behalf Of Rusty Sent: Monday, November 14, 2011 1:04 PM To: [email protected] Subject: {S-Scale List} Re: Bulbs vs. LEDs Does an LED get brighter or dimmer with a slow change in voltage input? Dusty --- In [email protected] <mailto:S-Scale%40yahoogroups.com> , "Ed" <Loizeaux@...> wrote: > > > I prefer the River Raisin method quality high performance motors and gearboxes <snip> > > Bill Winans > > I suppose a $120+ Swiss motor will result in improvement of slow smooth starts. But a better motor will not eliminate the voltage spikes of many power sources. Thus, bulb life expectancy will not change if an improved motor is used. Changing the power source might result in improvement of bulb life if the voltage spikes are eliminated. Ed L. > > > Those pesky brass diesels are the problem... > > Brass diesels work well with LEDs also. > > > it is still darn hard to simulate that "real" incandescent look, as LEDs tend to have a uniform brightness all across their face. > > The last time I looked at a real RR headlight straight on at night while lit, there was uniform brightness all across the face which darn near blinded me. The heck with uniformity, I was getting sunburned!! > > Are you perhaps talking about the non-uniform look of a bulb when it is off? If so, perhaps a near-trasparent decal over the face of the MV lens (diesel) or clear plastic flat lens (steam) will provide the look of a bulb more to your liking and still retain the inherent advantages of an LED (no heat, infinite life, low current draw, cheaper cost, etc.). Just think, that near-transparent decal could say things like "GE 100 watts" in really small letters. Now there is a new height for realism. > > Maybe just leaving the LED on at all times would look like a real bulb when lit. No matter how it is done, the end result with an LED is certainly better than replacing burned out bulbs on a regular basis. > > Cheers...Ed L. > [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
