My indoor range offers a Chrony for free use to their members (seems to be a rare thing, so I'm happy). I appear to be one of the few to ever use it, and I found out why - it constantly gives ERR9 (poor light condition). Tried all kinds of fixes; brighter bulbs, turned off the range lights, different distances, etc. Probably wasted 100 rounds trying. So I finally brought in a video light softbox (I'm a video guy by profession) & hung it over the Chrony - VOILA! Worked 100% perfectly. Every shot, good readings. Though I was happy to finally have it working, the softbox I had is too bulky to deal with on the range, but I have a suspicion that a couple of cheap scoop floodlights, hung on the target wire, with that diffusion material attached to the Chrony's light rods, will work just as well.
Hopefully this might help someone save some ammo.
Hopefully this might help someone save some ammo.