Could save some electricity charge if the power supply fancy LED lights are kept off.
All those LED lights spend less than a 1% of electricity involved, in fact real number is probably even < 0.1%. Next to nothing would be gained by turning them off.
I prefer LED turned off as each LED is about 1 watt and the total farm would take 20-30 watts which is still a burden when it come to ROI...
Seriously? 20w is maybe $2/month- definitely not breaking the bank, and looms pretty.
Most led power supplies do have a switch for the lights though