Spotlights Measurements

[Octopus]

Maybe two rows of 5?

5 lights = 6 spaces between them!

Hum... Think fence panels and fence posts ..... The posts are the lights , and the panels are the spaces between them

So 5 lights would have 4 spaces,

Thus 3.5 minus 0.7 x 2 = 2.1 divided by 4 = 525 mm , which IMHO is far too close together unless you are lighting an operating theatre!

 

[Taylortwocities]

Your fence doesn't have any walls!

I was starting and finishing at the walls.

Wall * * * * * Wall

That's 5 lights and 6 spaces

You may want a different dimension between the walls and the first fittings, but that's just simple arithmetic to work out the spacing.