If you already have T-8 fixtures. These would also help those with issues of trying to keep temps lower when cold treating seedlings. Still, I'd like to see the price come down even if they do last 45 years.
Home Depot
Philips
4 ft. T8 22.5-Watt Daylight (6500K) Linear LED Light Bulb
https://www.homedepot.com/p/Philips-...7211/204677351