Can anyone help with spacing of the 3 pendant lights? The island is 238cm x 120cm and I would like 3 lights over it - I'm guessing one goes centrally and then how far apart should the others be - thinking of getting glass pendants that are about 10 inches wide. is there a certain formula from how far from the ned of the island they should be? and how far from the work top should the drop be? TIA