3528 SMD LED is frist TOP style and developped with LED lighting developping.
SOL firstly TOP style is 3528 SMD with chip size of 10*20 Epistar chip and luminous flux is 7-8lm based on 20mA. In that time, we use 3528 SMD LED in LED bulb, LED Spotlight, LED Ceiling light,
but the most quantity is in LED Strip of SOL.
After SOL 5730 SMD LED is developping, 5730 SMD LED eating most LED lighting area. Now 3528 SMD LED still holding LED strip and part of LED spotlight with Cheap LED driver design. Now the cost of 3528 SMD is no value and would be less and less in Lighting area.