All 10 installed, all worked great. Before that I bought a ballast from Phillips and I don't like it. Just because the Phillips ballast turns on with a delay. Robertson ballasts turn on instantly. I've also found that bulbs that don't work on old magnetic ballasts often work on these electronic ballasts. I put them in Loa lights, cheap Walmart lights.
Robertson Worldwide ISL432T8HEMV AH 3P20160 120-277V 50-60Hz High Power Factor 4 F32T8 Linear Lamp Fluorescent eBallast
6 Review
π‘ Electronic FL Ballast ICN-4P32-N (Formerly ICN-4P32-SC) for 3-4 F32T8 F40T8 F17T8 Lamps, 120V/277V Compatibility
5 Review
Fulham WorkHorse WH2-120-C Adaptable Ballast - 2 Pack
3 Review
π‘ Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review
Electricity Monitor Voltage Overload Protection
8 Review
π GE 150 or 200 Amp Main Breaker Generator Interlock Kit - 1 1/4 Inch Spacing Between Main and Branch Breaker
7 Review
π‘ Professional Generator Interlock Kit: Compatible with Square D QO or Homeline 150/200 Amp Panels, 1 3/8" Spacing Between Main and Generator Breaker
7 Review
π Interlock Kit for Generators with Cover and QOM2 Frame Size Main Breaker Interlock Kit
8 Review