During Christmas they were selling ornamental peppers. Leaves were dark green, peppers were long and thin, in red, orange, and yellow. I grew seeds from them and they are growing great, but I have no idea if they were edible, and either sweet or spicy? My plant has no flowers or peppers yet so I'm not sure if I should tell others to grow them to eat or just for decor?
Usually, yes, and usually VERY spicy. If your tag says it is Capsicum annuum, C. frutescens, C. chinense, C. pubescens or C. baccatum, it's just as edible as any other hot pepper. (I think all the Capsicum sp. are edible, but don't quote me on it.) However not everything sold as an "ornamental pepper" actually is one. Solanum pseudocapsicum (Jerusalem cherry) for example, is quite poisonous and often sold.
The ones sold in garden shops are usually heavily sprayed and may contain systemic insecticides. I wouldn't eat those fruits but that wouldn't affect plants grown from seed the next year.
I saw in the store the exact pepper plant, it's called Medusa and from what I read its edible. However, like stated above, it might be a hybrid as the fruit differs, then again mabye it just doesn't grow true from seed and that explains fruit size difference.
I grow Medusa peppers and they are really small plants with droopy leaves with multi color fruit that grows upward. I just noticed that a few posts up I mentioned Medusa but the ones I'm growing have really thin leaves. Medusa is open pollinated not a hybrid but the fruit you got your seeds from may have crossed with another type of pepper so that would explain the difference. They are edible. You may want to look in the Plant Files to see what others say about them.