Table 2.

Types of light curing units, their intensity and methods of curing.

Type of LCU	Brand	Manufacturer	Curing mode	Light intensity output	Curing methods
QTH	Coltolux50	Coltene/Whaledent, USA	Full power	620	Continuous energy output for 20 sec.
LED	LED Turbo	Apoza Enterprise, Taiwan	Full power	600	Continuous energy output for 20 sec.
LED	LED Turbo	Apoza Enterprise, Taiwan	Ramp	+600	Automatically increase to full energy within 2 sec. + 18 sec. full energy
LED	LED Turbo	Apoza Enterprise, Taiwan	Pulse	600, 0, 600, 0	Full energy for 0.8 sec. with 0.2 sec. interval