Author Topic: Having a hard time going on  (Read 5904 times)
RRK
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Roman


Re: Having a hard time going on « Reply #30 on: January 01, 2025, 04:08:36 PM » Author: RRK
And yes, in the past, mercury lamps lasted longer ;)
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xmaslightguy
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Re: Having a hard time going on « Reply #31 on: January 02, 2025, 11:51:01 PM » Author: xmaslightguy
Quote from: RRK
In fact, today's lighting is not near being boring crap. Compact LED sources allow for some really creative luminaire designs if you look around. And what do you say for example about modern high-CRI LED module, emitting nice red-rich CRI98 light just by applying DC current? No high voltages, no explosion risks... Or other modern wonders like 200lm/W lamps emitting a LOT of acceptable quality light just by using some 5W of power...
True, not all LED lights are boring! ... but allot are (not that didn't also apply to many modern non-LED lights as well).

But 'crap' does apply to the vast majority on LED fixtures I see, be it cheap or expensive. Anything with integrated non-replaceable parts fits tn this category. (note: "non-replaceable" meaning not replaceable with a standard part - such as lightbulbs/tubes/ballasts/etc, how most older fixtures were )

Now efficiency, that simply put is where LED stands out! Along with lifespan - if it is a decent quality lamp.
Also decorative/colored is another place where LED has done great things (Christmas lights being one example, all the various RGB lights, being another)
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RRK
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Roman


Re: Having a hard time going on « Reply #32 on: January 03, 2025, 03:42:26 AM » Author: RRK
Well, today's lanterns are no more heavy cast aluminium/iron body. And since most of the body is plastic now, one can expect that large part of lantern cost goes for semiconductor light source and its driver. And even more cost goes to the energy consumed. Assuming this, it may be economically feasible to replace the whole lantern in the event of some serious failure, or at light source EOL (some 20-100K hours depending on quality). Even a mediocre 20K life means ~5.5 years of 10 hours at night service, note even a classic heavy duty luminaire will probably require a thorough refurbishment after 5 years of service in a typical city environment, which is costly!

 



 
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Baked bagel 11
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Re: Having a hard time going on « Reply #33 on: January 03, 2025, 03:59:43 AM » Author: Baked bagel 11
Current (ge), cooper and ael in the states all released new lanterns recently, all were aluminium.
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RRK
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Re: Having a hard time going on « Reply #34 on: January 03, 2025, 04:51:44 AM » Author: RRK
Even then, likely metal parts mass is heavily optimized, and is not dominating the lantern cost.

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Cole D.
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Re: Having a hard time going on « Reply #35 on: January 03, 2025, 12:44:21 PM » Author: Cole D.
Most hid lanterns lasted far longer than 5.5 years, needing only lamp or photocell replacements. Even many fixtures from 50 or 60 more years work fine now, if it wasn’t for led conversions.

Regardless, I don’t care about led fixtures. I don’t even own a home, and at 35 already, it’s unlikely I never will. So I don’t get to make the lighting decisions. I don’t have that kind of power or luxury. I simply live there.
« Last Edit: January 03, 2025, 12:47:58 PM by Cole D. » Logged

Collect vintage incandescent and fluorescent fixtures. Also like HID lighting and streetlights.

RRK
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Roman


Re: Having a hard time going on « Reply #36 on: January 03, 2025, 01:26:17 PM » Author: RRK
20K hours / 5.5 years is a rough minimal estimate for somewhat crappy lanterns. When thermal design done properly and adequate moisture protection, I bet 50K+ hours is achievable. That is usually enough for most luminaires to survive till next renovation, and as they will burn the energy much over their cost, it is not really matters economically if luminaires will be thrown away and replaced at that time.

 
I have a small boulevard/park near my old home. One half of it has MH luminaires, some 70 or 150W, not bad originally, but now somewhat run-down and spot replaced with HPS or even mercury lamps. Installed about 10-15 years ago. The other half was renovated and lighted recently, probably ~3years ago with LED luminaires. As much as I love HID lamps, honestly I have to say I prefer the look of the second part, luminaires are in proper 3000K, glare is controlled notably better than HID in the first part, color is nice, design is nice for a green area, no dead ones yet. So in this example, things definitely got better, not worse, over the course of time.





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Baked bagel 11
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Re: Having a hard time going on « Reply #37 on: January 03, 2025, 03:47:29 PM » Author: Baked bagel 11
My 2022 erl1 has a pretty thin casting.
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