2, 3528, 5050, etc. They are all low-power LED；; 0.3W belongs to the category of medium power; Generally, the power above 1W is called high-power led.
3. At present, high-power packaging mainly includes Corey, Philips (Lumen Lumileds was acquired by Corey), Osram, Japan Asia, Taiwan Province Yiguang and Addison.