So, what is the difference between the 1.7mA and 2.3mA boards?
Almost all LEDs can be driven way up in the 10-20mA range, but they are generally WAY too bright for scale model usage.
So you drive them down in the 2mA range, plus or minus.
To MY eye, and my memories of the mid 60s etc, most outdoor lamps were a 60-100 watt incandescent bulb, and the 1.7mA circuit driving a typical warm white pico LED looks about right. Now, going more modern, brighter bulbs, lighting a room in a building? 2.3mA looks better. Just think of it as "How bright do I want my LEDs to be?" My original use case is a 1950s rural freight house, and they were not typically all that brightly lit.
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