The DJI Spark is one of the coolest mini drones on the market with a plenty of smart features. If you are planning to fly it at night, you are going to need a decent light kit for it. The PGYTECH LED Drone Light for DJI Spark is worth a look. It has a polycarbonate and aluminum construction. The single step installation process means you are ready to go fast.
This light has 4 intensity levels (high, middle, low, and flashing). It runs on AAA batteries. It costs under $45 at this time.