Delta 8 THC gummies can last up to 8 hours, depending on the milligram amount and contents. Generally, Delta-8 effects can last anywhere from 3 to 8 hours, but each product style offers a different onset and duration. The average length of time that the effects of delta-8 lasts are statistically unknown at this point in time because it has not been properly studied. Delta 8 gummies can last for about 6 months to a year before expiring, but it's important to store them properly and check the expiration date to ensure that you are getting the most out of your gummies. Additionally, the duration of effects can also differ between delta 8 THC gummies and CBD gummies, with the effects of delta 8 THC gummies lasting for 4-6 hours or longer, while the effects of CBD gummies may last for 4-6 hours or shorter.