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Not that much because high pressure sodium lamps are very efficient.
LED offers better colour temperature, they last much longer and they don't contain hazardous materials like sodium and other metals.
LED's can be dimmed for more efficiency and are also instant on while HPS lamps take ~15 minutes to reach full light output.
I preferred the orange vibes. Don’t need pure white light at night, I just want to see where I’m going, not have it feel like daylight… Insects seem to agree.
orange is also much healthier for animals and insects like moths etc. Bright white lights at night confuse them
You could put a filter in front of the light to get that orange glow again but no place really does it. I agree tho I'll miss the orange glow. NYC at night just doesn't feel the same.
Yeah, same.
Funny thing is that human eyes are the most sensitive to orange light.
So in that perspective it doesn't make much sense to switch to white light.
Downside of sodium lights is that colours are very difficult to distinguish. A green car and a blue car will both appear brown under sodium light.
I despise white harsh white lights at night.
I agree. It’s terrible. They should go way warmer in the color temp.
It's funny you say that because the orange light is harder for humans to see in. Also we can still have orange lights with LED. You just need a different color temp
I feel lucky that my city opted for a warmer white LED replacement, I'd guess between 2700k-3000k. It feels a lot gentler on the eyes at night than most modern car headlights.
The chicago ones are dimmable.
Better color temperature is highly subjective. I despise the hospital vibe white temp that's going on lately. I miss the warmth.
I think the ballasts on a lot of the UK HPS streetlights supported dimming too. Vaguely remember reading about councils dimming certain sections of road as an energy saving measure way before LED’s were widespread.
Yes, humans thrive in the cold, clinical, unnatural light spectrum of the white LED.
You can walk around with the constant unease of a UFO abductee about to have an alien surgery on board an extraterrestrial spacecraft. It's like the kind of thing Charlotte Brontë would have written a poem about.
"Better" how exactly? Because it really sucks imho. Id rather a warm light to see than a purple light to be blinded by.
I'd argue against that. Sodium lamps emitted a orange light, which makes it easier to see at dark than white light. Using LEDs, you need much more Lumen to be able to see correctly, but this also means that the lights become more annoying for people living next to it.
The reason it looks like there is less light from the sky picture is because LED are more directional, so less light is being sent into the sky (wasted) than before using sodium light, and often bad reflectors.