Table 4.

 Within and between measurement repeatability for the CSLM and the NSLM (n = 49–55)

Test	Repeatability coefficient
	Within measurements	Between measurements
Conventional stray light meter	0.282	0.430
New stray light meter	0.489	0.394

For the CSLM, “within” values are better than “between” values, indicating that successive measurements are related. For the NSLM, “within” values are not better than between values, suggesting that successive measurements are independent. Values are higher than values in table 1, because values in this table reflect the repeatability of single knob settings and values in table 1 reflect repeatability of measurements, consisting of three knob settings