Okay, take this with a grain of salt, since I cannot find specific info about the species and its light requirements. You say it receives indirect lighting and does well; I'm basing my calculations comparing it to a tomato/pepper plant that needs lots of direct lighting (20 moles/day at the least during fruiting).

For your plant, I used 15 moles/day and based the lighting on a 12 hour on/off schedule. Depending on the type of light you use (MH or HPS - I don't have figures for CFL bulbs) but a ballpark figure is a lamp that gives you 20,000-25,000 lumens a foot above the canopy.

Basically, a 105 watt CFL bulb with a reflector (because they put out little heat and can be placed closer) or a 150-250 watt HPS or MH bulb. I think! More info about the size of your plant would help.

Mike