These lights are great on a dark night. They shed enough light to let you see your way.
They have 2 problems - the first is that you can't adjust how long they stay on, and invariably we find we would have liked 10 seconds more light. The second is that the screws they come with are cheap and will break in your screw gun - so have some spares handy. We actually used mirror tape and stuck them onto our gutters - seems to be working OK