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
You are utterly missing the REALITY of the lighting of LED chips. "Spot Focus"???
I set a 50 watt chip in a cube shaped room. Call it a 96" cube.
Flat against the ceiling.
Power it up
Lighting is EVENLY DISPERSED throughout the cube. Up to but not including within SIX INCHES OF THE CEILING. Evenly bright. Yeah, WAY UP THERE.
This isn't theory. It agrees with the HUNDREDS of COB lighting fixtures I have built and sold. Hundreds? Yes hundreds. 10x10 quantities. It helps to ACTUALLY WORK with this stuff. Design. Calculate. Build. Heatsink. See reality with own eyeballs. Recommendation: Look for image of chip above. Ten watts. around eleven volts if not using a driver.
In the three supermarkets I have lit, the 30 watt chips out perform fluorescent tubes as far as unmodified light dispersion is concerned. Way way WAY outperformed the 6 48" tube fluorescent fixtures. Unless of course you wish to argue with the store owners and scores of shoppers. Welcome to reality.
Single device point LEDs are indeed directional. Good traffic lamps have slightly faceted bases three-angles for the surface mounted devices. Take a moment and think. Some traffic lights are positioned so as to allow a driver a sliver of a crescent view from a 75 degree angle. And these are not flat chips. Yet you can clearly see the lamp from a 75 degree angle. And again to avoid confusing you, this is NOT the same lamp design protocol.
I had to tunnel SHADE my street lamps to avoid dazzling drivers approaching from ninety degree angle. This is mechanical FOCUSING of the beam. Mandatory not optional.
There are a lot of different LED 11" traffic bulbs out there. I do not need to familiarize myself with the "best" brands. But I am working on dual 50 watt limit focused RED lamps as a pilot path for beach approach angles for the night fishermen here The top lamp is 10 feet higher than the bottom and set back twenty feet. When the boats are directly in line with the beam they follow it straight into the beach landing avoiding bottom swale surf-lifting contours and wash rocks.
I set a 50 watt chip in a cube shaped room. Call it a 96" cube.
Flat against the ceiling.
Power it up
Lighting is EVENLY DISPERSED throughout the cube. Up to but not including within SIX INCHES OF THE CEILING. Evenly bright. Yeah, WAY UP THERE.
This isn't theory. It agrees with the HUNDREDS of COB lighting fixtures I have built and sold. Hundreds? Yes hundreds. 10x10 quantities. It helps to ACTUALLY WORK with this stuff. Design. Calculate. Build. Heatsink. See reality with own eyeballs. Recommendation: Look for image of chip above. Ten watts. around eleven volts if not using a driver.
In the three supermarkets I have lit, the 30 watt chips out perform fluorescent tubes as far as unmodified light dispersion is concerned. Way way WAY outperformed the 6 48" tube fluorescent fixtures. Unless of course you wish to argue with the store owners and scores of shoppers. Welcome to reality.
Single device point LEDs are indeed directional. Good traffic lamps have slightly faceted bases three-angles for the surface mounted devices. Take a moment and think. Some traffic lights are positioned so as to allow a driver a sliver of a crescent view from a 75 degree angle. And these are not flat chips. Yet you can clearly see the lamp from a 75 degree angle. And again to avoid confusing you, this is NOT the same lamp design protocol.
I had to tunnel SHADE my street lamps to avoid dazzling drivers approaching from ninety degree angle. This is mechanical FOCUSING of the beam. Mandatory not optional.
There are a lot of different LED 11" traffic bulbs out there. I do not need to familiarize myself with the "best" brands. But I am working on dual 50 watt limit focused RED lamps as a pilot path for beach approach angles for the night fishermen here The top lamp is 10 feet higher than the bottom and set back twenty feet. When the boats are directly in line with the beam they follow it straight into the beach landing avoiding bottom swale surf-lifting contours and wash rocks.
