I took some new lights out for a test ride last night. I mounted Cygolite's Trion to the left of the stem, and a P-Rocket Cree XP-G R5 450 from ShiningBeam to the right of my wireless Cateye. Here's a grainy, fuzzy picture of the layout...
When the Trion was on, the Cateye stopped working. Like it wasn't getting a signal, and basically behaved like the bike wasn't moving. I guess the Trion creates some sort of interference. When the P-Rocket was on, the Cateye ticked along happily, despite being even closer together. I'm guessing this is a power supply issue? The P-Rocket is just running on an 18650, but the Trion has some sort of proprietary built-in battery.
I could probably address this by getting a wired Cateye, but the light from the Trion -- though basically working pretty much as advertised -- didn't impress me enough to justify the extra expense, so back to Amazon it goes. I'm looking for something to get me down dark mountain descents (road, not MTB), and the Trion's soft flood didn't do much for me. The P-Rocket was pretty good, and the spot was more conducive to highlighting road hazards, but I think I'll go back to Shiningbeam and look for a brighter light to use as my primary.
Anybody else ever have problems with a light jamming signals for a wireless computer?