Landing lights are not required unless you're in a for hire operation, which you won't be on an experimental. You can install them if you like. All you need are the three navigation (red left wing, green right wing, white tail). The requirements for anticollision lights (beacons, strobes) are written into the certification rules so they don't apply to homebuilts, though it might not be a bad idea to have them.

Your right position light must be AVIATION GREEN. Blue will NOT cut it. However, check it while it's illuminated. Sometimes the lenses don't really show their true color when they're not lit.