Quote Originally Posted by RobinC View Post
The 10 mt point is covered in ISSF rules available on the ISSF website, section 6.4, and covers all items including light levels. just as a quick guide, drawn from the various sub sections :-

The distance is 10 mts + or - 0.05 mt From the firing line to the target face.

Height to target centre 1.40 mt + or - 0.05 mt

Target centres must be on the centre line of the firing point, variation in either direction 0.25 mt

The firing point must be a minimum of 1.0 mt wide.

The nearest edge of the bench must be placed 10 cm forward of the firing line.

Recommended light over the general range measured midway a minimum of 500 Lux

Target lighting, Minimum 1500 Lux, recommended >1800 Lux

That near enough covers it!
Have Fun
Robin
Thanks for your input