Mr resistor,in balham,London ,think I paid £15 each wivout the lamps.once you decide on your positions I brought a proper hole cutter and gripfilled them in the day before I set my ceilings ,some needed a few temporary screws in to hold certain parts of the mesh fitting to get it tighter to the ceiling of which I removed before plastering,I gave it 3 costs of plaster, the first just up to the mesh ,the2nd and 3rd all over, mine come with a polystyrene infill to protect the inside from getting shi tted up but I never used them I went round and put duck tape on the inside flush with the edge ,and when finished pulled off duck tape and everything was clean, also they don't throw shadows no more than ordinary spot lights, well I don't think so ,I'm really pleased wiv them ,hope that helps ya