Wayside Observer Posted January 25, 2021 Report Share Posted January 25, 2021 2 hours ago, smallspy said: I suspect that you might be entertained by some of the methods and techniques that some agencies are using to decontaminate their vehicles. I've seen photos of what could be best described as patio lanterns strung up inside a subway car, equipped with what are likely UV bulbs. Kim Mitchell would be proud. New York experimented with something similar permanently installed on the R11 cars but scrapped the idea because passengers being exposed while they were on didn't work out very well. Doing that with an unoccupied car is fine and lets you crank the UV way up which is probably what they're doing with the lantern string. Given how much of modern vehicle interiors is plastic, it'll be interesting to see how well that stands up to UV exposure since that does deteriorate plastic over time. 2 hours ago, smallspy said: On some older vehicles, it wasn't easy to access the housings containing the lights - thus, they would get filled with airborne particulate matter and allow less light to pass through. (In some cases, it may just be that they stopped doing that kind of cleaning as the vehicles got closer to their demise.) Thus, when newer vehicles entered service, without the benefit of having years of accumulated grime to shield the photons, seem to be considerably brighter inside. It was never all that hard to get at the lights on the old vehicles. They were deliberately made reasonably accessible so that burned out bulbs could be replaced easily which was a normal part of business. The problem was that the accumulated grime wouldn't be cleaned out until the next time the car went through a full interior wash. If you caught a train with mixed cars where one unit had been through a full interior was recently and the others hadn't, the difference was night and day in terms of how much cleaner and brighter the recently cleaned ones were compared to the others that had months of accumulated brake dust grime. 2 hours ago, smallspy said: Newer materials, again without having been affected by age, may be more reflective and thus reflect more light as well. Another likely factor is that - well, they are actually brighter inside. The current trend for public areas is to be brighter, as it is frequently felt that brighter = safer. (Whether it actually is remains up for debate, but sometimes it's better to err on the side of perception than anything.) They are measurably brighter inside. I did some somewhat scientific measurements with a Sekonic light meter in a Toronto Rocket, a T1 and an H5, meter sitting face up on the floor in the middle of each car while in a tunnel to avoid any meaningful influence from oustide light and it nudged up each time, but the biggest jump was T1->Toronto Rocket. Safety is a concern up to a point, beyond that brighter is just brighter. There are marketing aspects to it as well. One of the unfortunate side effects of really efficient LED lighting is that the operating costs are low even in places where electricity is expensive, which means there's no second thought anymore about what turning it up to eyeball searing, light polluting levels is going to do to the utility bill as a disincentive the way it used to be. 2 Link to comment Share on other sites More sharing options...
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