I will not use any other lighting. I may add 2 led strips for some of the "fun" effects. But the 3 bulbs provide plenty of light. There a few corals about mid way deep (roughly 12 to 14 inches below the waterline) that reach photosaturation about 1and a half hours before the lights go out.
The electric bill is about the same compared with last year. I actually had a day last week where the heaters never went on during a 24hr period. The tank temp was roughly 79 for the same period.
I just purchased three Reefbrite mh/led pendants with their pendants and running their 14k twin-arc bulbs... I'm only running them five hours a day while I acclimate my corals, and after 4 days my ph has risen .2 higher during the photoperiod than with my previous led/t5 hybrid.... 100% coverage of the tank... I could not be happier.