We are using smd chip led 3528 which prescribe 20 miliamp standard forward current. I want to know basic calculation like those bulb. How do i find forward current? 12 volt dc light, 48 pc smd chip, 16 parallel connection 3 series (as each chip volt is 3.5 to 4) Now we found that 3.14 watt is consuming this bulb means 0.26 amp consumption (12 volt). How we can found the each smd forward amp?