My wife was sensitive to the flickering of CFLs and LEDs running on AC, so we installed some dedicated 12V DC circuits in our house and they are really great. W

My wife was sensitive to the flickering of CFLs and LEDs running on AC, so we installed some dedicated 12V DC circuits in our house and they are really great. We run strings of DC LEDs from them, and they are bright and flicker-free. You can run the lights off of 12V batteries and charge those from a few solar panels, or just have one dedicated high-quality AC-DC transformer for the DC circuits.