90CRI light bulbs are widely available from stores such as Costco, Home Depot, Lowes etc. However, all the ones I’ve tried don’t have tint anywhere as nice as those on the E21A emitters. I prefer below the BBL tint so I’ve been ceiling bouncing E21A lights for night time use. Wish there are some warm 90CRI bulbs with good rosy tint. The only bulbs I’ve found with nice rosy tint is the Ikea GU10 halogen replacement bulbs but those are not A19. If you don’t care about tint, and just want hi CRI, you can also just order some cheap ones on Amazon.