This question is important because outdoor panels are generally more expensive than indoor panels. The primary difference is resolution. Since outdoor panels are usually seen from further distances, screen resolution will be lower. Outdoor LED panels will likely be brighter because they are used in sunlight. Also, outdoor panels will be more durable as they need to withstand weather conditions: dust, moisture, dirt, etc. Outdoor panels will consume more energy as well. On the other hand, indoor panels have higher resolution, are less durable to weather, but consume less power. For all these reasons, we recommend indoor panels, unless you need to use an outdoor screen.