> There are no such constraints with the upright action, so can you > explain why only Steinway, to my knowledge, on the old K uprights etc., > implemented any such arrangement for a while and then abandoned it? In > 120 years none of the great makers seem to have acknowledged the > brightness of this great light. > > JD Considering the features that were kept even though they don't work that well, I'd guess it was because no one, including Steinway, thought the results were worth the trouble in practice, and it had no marketing wattage. In practical application, some bright lights are just glare. Ron N
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