I've recently purchased 3 dwarf citrus trees that we plan to keep indoors for ~9 months of the year. We are in zone 6 so we can only reliably move the trees to the porch for June, July and August with time moving in and out in the spring and fall for acclimation.
The trees will be kept in 3 different rooms, all of which we regularly use. The individual trees are Dwarf Meyer Lemon, Dwarf Venous Orange and a Dwarf Key Lime.
Current available lights are 6 300 watt max can/spring lights that mostly have 100w equivalent 1600 lumen leds on the 5000K spectrum and then I purchased 3 200w Comp Fluorescent lights that initially will be running 6400k 200w lights that, on the safe side, we will estimate at 13,000 lumens. These lights will all be custom mounted on an adjustable bar and kept a little less than a foot from the top of the trees as they grow and be put on timers for 14-16 hours a day. Combined this calculates out to ~58,000 lux per tree given a 3'x3' area, using 2 can lights and the 1 compact fluorescent.
There will be very little window light access, maybe only a few hours a day from a southern facing window. I'm loath to do anything extra special on the color spectrum, since these are rooms we regularly use like the kitchen/bedroom/hallway. While I can direct the lights so that they are not at risk of shining directly in people's eyes, creating such a bright room that we would not want to sit near it without sunglasses isn't optimal either.
Questions: Is my current plan sufficient for light? If it is not, what is the most cost effective way of making it sufficient? Do any of the 3 have greater light requirements than the others?