I am trying to find out how to work out the distance between LED's to get the maximum light coverage from the LED's Also when purchasing LED's I get confused. some are quoted in Watts and others in mcd with a value in nm Some have a colour temperature also. I am trying to make a portable light for a maternity hospital for the staff to use when sutchering. I believe the required colour temperature for day light is 5500k to 6500k. Could some guide me in the right direction please.