The Effects of Ingesting Cannabis are longer lasting than Inhaling Cannabis Smoke.    

Edible Effects can last up to 12 hours, with residual effects lasting up to 24 hours. If you are new to edibles or to cannabis, use edibles medicinally or for social and recreational use, do so in a safe and comfortable environment with experienced users (for new users with attention to potency) and make prior arrangements and plans for travel and designated drivers. Most importantly, consider the day after your use and any demands or commitments you may have which require driving, Never Drive High, even if you had a good night's sleep, and Manage Your Edible Use. 

Cannabis is Common Sense, Expect a stronger and more intense effect with edibles than other means of consumption, and Avoid Mixing with Alcohol and other Drugs.