please help

I have a new hobby - a saltwater fish tank that will contain mostly live corals (called a reef tank). I am currently in the planning stage and am gathering knowledge to give me the best chance of success with my tank. As part of the planning stage, I reached out to 700 experienced Central Florida reefers (people who currently have a reef tank) and asked them to provide the following information: Size of the tank (in gallons), Type of Lighting used (Florescent, LED, Hybrid, or Other), and how long (in years) they have been in the hobby. Part of the analysis involves trying to estimate the proportion of all Central Florida reefers who use LED lighting. A 95% confidence interval was constructed to be: (.755, .816). The sample proportion reported was .7855. Was the sample size considered large in the construction of this confidence interval? No, since n is less than 30. Yes, since np and no are both at least 15. O No, since no and nq are not both at least 15. Yes, since n is at least 30