I had the same problem with my wireless computer when I installed a more power LED light (Magicshine). The only way I was able to solve the problem was to install a new wired computer on my commuter bike. I'm now commuting on several different bikes, two of which have wireless computers, using a different headlight (Light & Motion Stella 300), and have no interference problems. So, it depends on the light as well as the computer. I have also noticed that traffic signals will cause strange readings on some of my wireless computers -- like showing a maximum speed of 100 mph.