HELP. What lights do I need? Iguana owners only please?

My Iguana has a new home and the lights I put on it arent strong enough. The cage is 6 feet long 6 feet tall and 3 feet front to back It is all solid wood with plexigl siding and doors. The top is wire screen for light placement and ventilation. I currently have a 18" UVB tube light and a 100 watt day and night night. What other lighting do I need?