IMHO lights are a waste of weight and power. Unless you plant to fly at night.
One of the things that are difficult at night is determining altitude on landing. So your lights need to be bright enough to shine off of the ground. Or mount a small flash pointing fwd and down.
Yes I have flown at night. Dusk is going to be bad too much light for your lighting system to be effective, not enough light to see the airplane.
To fly at night it's best to sit in the dark, no lights, for 30 minutes. Then let a helper turn the lights on in your plane and carry far enough away from you yo keep your night vision