Three or four times of doing this, and he was ready for a cigarette and a nap. We have been trying cutting down the supplemental lighting period to only 10 hours, from 8 am to 6 pm. Another way that has worked to cut through a prolonged breeding season is to trick the iguana's system. Provide a comfortable basking area in a dark room - use heating pads and nocturnal lights or ceramic heating elements to provide the heat. When you take the iguana out after the three days, make sure you stick to a rigidly diurnal schedule for several weeks.
Some owners are, by choice or happenstance, nocturnal by nature.
While this may be fine for humans, it is not for a diurnal animal. Iguanas need to sleep at night. They need to eat during the day. They need a length dark period at night when they sleep. If you work at night or get up late in the day and stay up till the wee hours of the morning, that's fine - just don't force your ig to the same schedule.