Superflash

The 'damage' it's flash inflicts is purely eyes-only, you don't physically knock someone out with a superflash grenade unless the 5L physical damage at the 1m core does it.

Further, the worst a vision-based penalty can be is -8, for Blind Fire, even if you get a full Deadly result from damage staging. The penalty would stay at -8 for 3 minutes then, before dropping off 1 a minute from that point on though.

Also, the superflash does not affect non-vision-based systems, such as cybernetic ultravision based in the ears, or astral perception.