Originally Posted by HiYoSilver

Ok, completed light test. Performance dual 10w & 20 w light set.

Test: dark city street, 2 objects on payment. 1 light stone about
2" by 1 " and a piece of bark about 3"x1"

[ lights on ] __ [ distance to see white ] __ [ distance to see dark ]
10 watt __ 36 feet __ 74 feet
20 watt __ 45 feet __ 114 feet
30 watt __ 69 feet __ 117 feet

Notice that with both lights on, the dark object could not be seen much sooner. One light
is flood and one is spot, so you wider field of vision.

We can do the math tomorrow and calculate safe riding speed. This is approximately
1 1/2 house lots, so I would think safe speed would be roughly in the neighborhood of
13 mph. But we'll see who can make the best math case allowing for a 5 second reaction time
gap.