1. For general household, the maximum size of the tube lamp is not more than 2.5 inches, just put 5W energy-saving lamp.
2. LED Downlight is a modern one. It can be used as a substitute for ordinary tube lamp. The light is better than ordinary one.
3. There are also many kinds of materials for cover of downlight, such as iron surface, pure aluminum, die-casting, etc. Generally speaking, the price of tube lamp of iron surface is cheap, and the materials of pure aluminum and die-casting are relatively expensive, but they are more durable. More often used in the project for the iron surface of the tube lamp, but it is recommended that the domestic installation of the led downlight with not easy to rust cover.