Table 3. Data regarding depth of polymerization on placing tip of LCU in contact with composite at different distance between light tip and composite specimen.

	Polymerization depth in mm
Distance of separation mm	20s unit P	20s unit Q	20s unit R	60s unit P	60s unit Q	60s unit R	3s unit S	20s unit T	20s unit U	20s unit V
0	3.29	2.91	1.92	4.31	3.91	2.4	4.51	5.22	5.24	5.25
1	2.91	2.77	1.89	3.93	3.93	2.35	4.5	-	-	-
2	2.62	2.59	1.68	3.7	3.88	2.36	4.25	-	-	-
3	2.63	2.54	1.64	3.57	3.75	2.34	4.15	-	-	-
4	2.56	2.52	1.62	3.63	3.62	2.17	3.83	-	-	-
5	2.52	2.46	1.58	3.56	3.56	2.14	3.64	5.33	5.02	5.02
10	2.31	2.34	1.45	3.45	3.42	2.1	3.72	4.27	4.25	4.25
15	-	-	-	-	-	-	-	3.17	3.62	3.63
	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.001