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Thanks for that. Maybe something for Tim to consider with all the locos factory-equipped with LEDs.
On the left is my r/c battery (not RP) Stewart F3 with warm white LED headlight. Looks good to me.
The F3 headlight does look good.There is considerable spectral difference between LEDs and incandescent lamps so one will never look like the other. Whether or not either is good enough is a personal choice.Here is a good explanation of the differences in light output: https://www.comsol.com/blogs/calculating-the-emission-spectra-from-common-light-sources/. The graphs make it obvious they are two very different light making animals.
I was sitting opposite a FedEx 767 today in DFW and their taxi light was a bulb. It had a 1 second off to on time lapse and then 2-3 second on to off time lapse. Our newer Airbi have LED's and it's an instant on/off whereas the older Airbi have bulbs and softer on/off cycles.
Quote from: TwinStar on August 14, 2019, 12:34:52 PMI was sitting opposite a FedEx 767 today in DFW and their taxi light was a bulb. It had a 1 second off to on time lapse and then 2-3 second on to off time lapse. Our newer Airbi have LED's and it's an instant on/off whereas the older Airbi have bulbs and softer on/off cycles.That filament is really hot. Takes it a while to cool down enough to quit producing light. I notice the same rapid-on / rapid-off with late model car taillights and turn signals.In high school a buddy of mine installed aircraft landing lights in place of his high beams. (For you youngsters, car headlights used to be interchangeable round sealed beam bulbs) The rated operating life of the aviation bulbs was really short and sure enough they burned out rather quickly. But dang, they were bright. Lit up the road for a mile ahead. We used to joke he could blister the paint off of any car in front of him. The adventure didn't end well. Eventually he melted the headlight wiring harness.
Newer is not always better! At least not in all situations. Awhile back read something about LED traffic signals obscured during a blizzard by built up blown snow because they didn't make enough heat to melt it away fast like the incandescent did.