Night lights
David, I agree, the more the merrier for safety, but within reason. We use a backstay mounted oil lamp for an anchor light. Your two lights at deck level may be overkill and even more confusing for other boaters. The anchorages we use regularly are so small that anything up at mast height wouldn't be seen anyway. We swapped out the energy guzzling standard anchor light for a Davis low draw mega light years ago but rarely use it. But if we did, one high and ONE low would seem safer, 'cuz the two at deck level may be more confusing than helpful and someone could try to run between them. Us old timers usually only had ONE deck level anchor light.
The anchor light provides enough light for movement in the cockpit at night. Recently a crew mate asked me to turn it off because it was interfering with his star gazing!
If we need more light, we turn the lights in the aft cabin on and they shine through the two ports into the cockpit foot well.
Where we are it's usually too cold to stay up in the cockpit after dark, so we don't need reading lights. If we did, I'd consider a battery powered stick-on LED light on the dodger frame, a solar light, or would wire something in permanently.