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Pelican Crossings
Hello,
I saw this about pelican crossings and the associated crossing signals. BTW, I've noticed for a while now that the green on pedestrian crossing signals no longer flash flash, but rather go dark. Is that because of the stress that the flashing signal puts on the bulb filaments, thus meaning more money expended for bulbs, plus the labour involved in changing them? |
Pelican Crossings
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Pelican Crossings
On 15/06/2013 01:35, wrote:
In article , () wrote: Hello, I saw this about pelican crossings and the associated crossing signals. BTW, I've noticed for a while now that the green on pedestrian crossing signals no longer flash flash, but rather go dark. Is that because of the stress that the flashing signal puts on the bulb filaments, thus meaning more money expended for bulbs, plus the labour involved in changing them? All new installations use LEDs so that is a diminishing problem if it exists at all. And the old ones? Because here in London the green pedestrian crossing phases turn off, rather than flash. |
Pelican Crossings
On 15/06/2013 02:34, wrote:
On 15/06/2013 01:35, wrote: In article , () wrote: Hello, I saw this about pelican crossings and the associated crossing signals. BTW, I've noticed for a while now that the green on pedestrian crossing signals no longer flash flash, but rather go dark. Is that because of the stress that the flashing signal puts on the bulb filaments, thus meaning more money expended for bulbs, plus the labour involved in changing them? All new installations use LEDs so that is a diminishing problem if it exists at all. And the old ones? Because here in London the green pedestrian crossing phases turn off, rather than flash. Could this be due to the differences between proper Real Lamps (incandescent ones) and the newer Pretend Lamps which have very poor performance just when turned on or off and are of limited value for signalling purposes for that reason? |
Pelican Crossings
On 15/06/2013 11:32, JNugent wrote:
On 15/06/2013 02:34, wrote: On 15/06/2013 01:35, wrote: In article , () wrote: Hello, I saw this about pelican crossings and the associated crossing signals. BTW, I've noticed for a while now that the green on pedestrian crossing signals no longer flash flash, but rather go dark. Is that because of the stress that the flashing signal puts on the bulb filaments, thus meaning more money expended for bulbs, plus the labour involved in changing them? All new installations use LEDs so that is a diminishing problem if it exists at all. And the old ones? Because here in London the green pedestrian crossing phases turn off, rather than flash. Could this be due to the differences between proper Real Lamps (incandescent ones) and the newer Pretend Lamps which have very poor performance just when turned on or off and are of limited value for signalling purposes for that reason? Don't know. |
Pelican Crossings
On 2013\06\15 11:32, JNugent wrote:
On 15/06/2013 02:34, wrote: On 15/06/2013 01:35, wrote: In article , () wrote: Hello, I saw this about pelican crossings and the associated crossing signals. BTW, I've noticed for a while now that the green on pedestrian crossing signals no longer flash flash, but rather go dark. Is that because of the stress that the flashing signal puts on the bulb filaments, thus meaning more money expended for bulbs, plus the labour involved in changing them? All new installations use LEDs so that is a diminishing problem if it exists at all. And the old ones? Because here in London the green pedestrian crossing phases turn off, rather than flash. Could this be due to the differences between proper Real Lamps (incandescent ones) and the newer Pretend Lamps which have very poor performance just when turned on or off and are of limited value for signalling purposes for that reason? Except that modern traffic lights are LEDs which have excellent response times and are therefore perfect for signalling. |
Pelican Crossings
On Sat, 15 Jun 2013 14:13:55 +0100, Basil Jet
wrote: On 2013\06\15 11:32, JNugent wrote: On 15/06/2013 02:34, wrote: On 15/06/2013 01:35, wrote: In article , () wrote: Hello, I saw this about pelican crossings and the associated crossing signals. BTW, I've noticed for a while now that the green on pedestrian crossing signals no longer flash flash, but rather go dark. Is that because of the stress that the flashing signal puts on the bulb filaments, thus meaning more money expended for bulbs, plus the labour involved in changing them? All new installations use LEDs so that is a diminishing problem if it exists at all. And the old ones? Because here in London the green pedestrian crossing phases turn off, rather than flash. Could this be due to the differences between proper Real Lamps (incandescent ones) and the newer Pretend Lamps which have very poor performance just when turned on or off and are of limited value for signalling purposes for that reason? Except that modern traffic lights are LEDs which have excellent response times and are therefore perfect for signalling. Indeed, and the effect is very obvious with the many road vehicles (even buses) that have LED indicators. They really do switch on and off instantly compared to the old incandescent bulbs. The next Mercedes S Class will ditch incandescent bulbs entirely, using nearly 500 LEDs instead, thus saving power, performing better and largely eliminating the need to replace failed bulbs. |
Pelican Crossings
In message , at 14:20:02 on
Sat, 15 Jun 2013, Recliner remarked: The next Mercedes S Class will ditch incandescent bulbs entirely, using nearly 500 LEDs instead, thus saving power, performing better and largely eliminating the need to replace failed bulbs. But I'm sure that should any of those LEDs fail, the bill will bring tears to the owner's eyes. -- Roland Perry |
Pelican Crossings
Roland Perry wrote:
In message , at 14:20:02 on Sat, 15 Jun 2013, Recliner remarked: The next Mercedes S Class will ditch incandescent bulbs entirely, using nearly 500 LEDs instead, thus saving power, performing better and largely eliminating the need to replace failed bulbs. But I'm sure that should any of those LEDs fail, the bill will bring tears to the owner's eyes. Undoubtedly, but at least the chances of that happening are remote. If the LEDs survive the guarantee period, they'll probably outlast the rest of the car. |
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