I made my own light kit, simple, inexpensive and works perfectly. Go to Home depot or similar store and pick up an aluminum reflector with a receptacle for a bulb. The reflector should come with a clamp which you can you use to attach it to the chrony. 100 watt bulb works well. Cut a piece of white board that will sit on top of the Chrony rods. Position the light so it blows light up and back to the sensors. I have had mine for 4 years now and get very accurate and consistent results.