As the guys say, it's pretty common currency; I've done the soccer pitch thing and it was fine. A mate took a Springer virtually to Field Trial level doing the same, so there it isn't any fundamental reason why it isn't working out for you.
One thing you might care to check out is the position of the lights relative to your dogs eyes. Because he's lower down than us, he has to look up at a greater angle to see anything that's in the air, and the lights will tend to blind him. He hasn't learned yet how to handle this by turning his head a bit and looking away from the glare.
For the main part I only used plain white dummies which have more contrast than the others; worth a shot.
In short, do as Tobias suggests, and let Fido get used to the idea. Iffen it was me I'd forget anything flying through the air for a while to avoid the possible dazzling / puzzling stuff and concentrate on obedience work; walking to heel off lead, sit /stay, recall, whistle sits at distance, plus a few memory retrieves of dummies dropped as you walk along, rather than throwing them. When you're happy with that throw dummies away from the lights rather than towards them for a bit.
It'll come good, best of luck,
Eug