traffic lights meltring
Those new LED taffic lights that we are seeing lateley are melting in the latest heat wave. Mexico news daily had a photo of one that looks like something out of a Dali painting.
Forum Discussion
Different strokes. To me when designed properly an LED lamp over incandescent is like incandescent over whale oil.
Try these chips. They operate at 10.7 volts or 36.0 volts for 20 watts and up.
No different here with streetlight area lighting. This is because the designers of the streetlights are trying to sleaze by with seven or nine watts. Sodium lights in the states rarely are less than seventy watts.
My 30 watt chips glow as brightly as a 300+ watt incandescent by actual eyeball not some perverted lumen measuring meter.
What LEDs do not do is illuminate areas above it. See the pretty ceiling and top two feet of walls -- not.
The highway streetlamp over Mex 200 had vertical visors. Would not blind drivers even twenty feet from the crosswalk. By the time the driver got to the intensely illuminated area the point of origin was directly overhead.
Take a 10-watt chip and hoist it directly overhead and light dispersion is absolutely linear in a gradient from straight down and outward.
Actually examine the lens of an LED streetlight emitter. I know of no design that does not use a FRESNEL lens that utterly destroys the natural gradient of luminosity of the emitter. The reason being is the so-called designer has retained the fresnel lens from high intensity metal emitter lamps. And THAT is not wisely done. Obtuse rings hot spots and shadows. Rather stupid. Even the CREE lamps had fresnel dispersion.
I mused my lighting effect a lot before designing my street lighting. As a vehicle approaches the highly oblique angle of the emitter plus visors concentrate the illumination in a focused manner. Then the hood of the vehicle shades the high luminosity of the target area. Leaving OBJECTS (small children) lit. Leaving the target there is minimal dazzle after effect. People from neighboring pueblos want lights for their crosswalks. Truck and bus drivers have furnished 100% favorable comments.
Now this doesn't say much about the competence of contemporary street lighting engineers, does it? Unlike many folks who think by proxy, agree by power of fiefdom and do not challenge the status quo -- I disassemble and audit performance, circuitry and component quality.
On a scale of 0-10 for commercial LED lighting I see here and in the USA I feel a point seven might be generous. It is pathetic.
Try these chips. They operate at 10.7 volts or 36.0 volts for 20 watts and up.
No different here with streetlight area lighting. This is because the designers of the streetlights are trying to sleaze by with seven or nine watts. Sodium lights in the states rarely are less than seventy watts.
My 30 watt chips glow as brightly as a 300+ watt incandescent by actual eyeball not some perverted lumen measuring meter.
What LEDs do not do is illuminate areas above it. See the pretty ceiling and top two feet of walls -- not.
The highway streetlamp over Mex 200 had vertical visors. Would not blind drivers even twenty feet from the crosswalk. By the time the driver got to the intensely illuminated area the point of origin was directly overhead.
Take a 10-watt chip and hoist it directly overhead and light dispersion is absolutely linear in a gradient from straight down and outward.
Actually examine the lens of an LED streetlight emitter. I know of no design that does not use a FRESNEL lens that utterly destroys the natural gradient of luminosity of the emitter. The reason being is the so-called designer has retained the fresnel lens from high intensity metal emitter lamps. And THAT is not wisely done. Obtuse rings hot spots and shadows. Rather stupid. Even the CREE lamps had fresnel dispersion.
I mused my lighting effect a lot before designing my street lighting. As a vehicle approaches the highly oblique angle of the emitter plus visors concentrate the illumination in a focused manner. Then the hood of the vehicle shades the high luminosity of the target area. Leaving OBJECTS (small children) lit. Leaving the target there is minimal dazzle after effect. People from neighboring pueblos want lights for their crosswalks. Truck and bus drivers have furnished 100% favorable comments.
Now this doesn't say much about the competence of contemporary street lighting engineers, does it? Unlike many folks who think by proxy, agree by power of fiefdom and do not challenge the status quo -- I disassemble and audit performance, circuitry and component quality.
On a scale of 0-10 for commercial LED lighting I see here and in the USA I feel a point seven might be generous. It is pathetic.
