Tom, I went retrofit LED bulbs from Hyperikon that are sold on amazon in my 3 car garage shop with 10’ ceilings. They sell them in 4, 12 and 24 packs. 5000k temp and 90+ CRI. They fit in T8 and T12 fixtures and are like $10.50 a bulb in the larger packs. If I remember correctly these need the ballast removed in order to work but they have ones that work with the ballast but are only like 80CRI. Removing the ballast took me like 3-5 mins per fixture. They don’t have high CRI in 8’ bulbs but you could always go two sets of 4’ fixtures to make up for it. So far I am like 18 months in and have not had one failure and I love the temp and CRI on them. I saw a recommendation in thread for T5HO and would recommend against those with your 10’ ceilings. They are going to be so bright it will hurt you eyes without a strong diffuser on it. T5HO are great for high ceilings but I personally don’t like them in lower ones like 10’. Good luck.
https://www.amazon.com/dp/B01H4KU8FU...ing=UTF8&psc=1