Our galley fluorescent lighting ballast crapped the bed a month ago so we have been looking for an LED replacement. I came across these and decided to give them a shot, will be installing next week and follow up with the results. They are available in 2x2 as well as 2x4, may be installing in the ER fixtures if they are worthwhile.

https://www.amazon.com/gp/product/B0...I542K9SJ&psc=1