I started in mid-November and have already had 5 harvests! The outrageous red and oak leaf letteuce have done the best. None of the black seeded Simpson survived. They're all leggy because of the distance to my grow lights but one of these days I'll get around to setting up a way to drop them down.
At this point, I'm getting about 1 cut and come again harvest per week from all 4 plants which is far more than I expected. Once the weather warms up, I'd like to chop them and start new seedlings for outside on the balcony. I have been averaging about 14-15kWh, or 2¢ per month in electricity costs.
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Looks great! Your electricity must be super cheap. I wonder if there is something about the red lettuce that works better with the spectrum provided by your lights