In the US, AC 150/5340-30B "The line of lights is offset a maximum of 2 feet (0.6 m) from the runway centerline to the edge of the fixture... See AC 120-28 and AC 120-29 for additional information."
If the strip is 3 feet wide, that would put the lights just at 6 inches off the edge of the light.
Quick, which side of the centerline are the lights? On the side toward the terminal or on the side away? Or are they in the center and the paint goes around them?