Upon arrival performed maintenance on 4 systems. Cycled in heat and cool mode. Inspected systems electrical components, coils, pressures, changed filters, and cleared drain lines. The 3 units upstairs have us lights and the bulbs are burnt out. Mentioned this issue and we need to get a quote and send over how much it would be to replace the bulbs. All 4 surge protectors are working. Left system in good working order.