Thank you so much for the quick crash course lol. I come here to learn and I appreciate explaining that to me. I am definitely going to keep rocking the Tasty.How about some education. Your T4-2100 means that your lamp has 4 cobs ran at 2100mA which tells me that the cobs voltage is 36.6. Now take 36.6 x 2.1mA=76.8 watts per cob now times that by 4 which = 307.4 watts which is your total output. Im or was running my original Bridgelux Vero build from 2016 and I haven't had any decline in photons. I would say your Tasty T4-2100 should last you another 5-7 years. Cobs are rock solid