I have used several of these to replace defective original unbranded ballasts in pendant lights. They work great and fit into the restrictive geometry of the light frame. Please note that this ballast ("instant start") is designed for bridged cartridges and therefore works with the original cartridges supplied with my lamp.
๐ก Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
5 Review
Robertson Worldwide ISL432T8HEMV AH 3P20160 120-277V 50-60Hz High Power Factor 4 F32T8 Linear Lamp Fluorescent eBallast
6 Review
๐ก High-Quality Advance ICN-4P32-SC Electronic Fluorescent Ballast: Ideal for 4 Lamps, 32W T8, 120/277V
3 Review
Wireless Electronic Ballast Interface Certified
8 Review
Electricity Monitor Voltage Overload Protection
8 Review
๐ก 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
๐ Interlock Kit for Generators with Cover and QOM2 Frame Size Main Breaker Interlock Kit
8 Review
โก Enhanced Watt Meter Power Meter Plug: Convenient Home Electricity Usage Monitoring with Backlight, Overload Protection, & 7 Modes Display
7 Review