Why do LEDs need resistors? - Electronic Guidebook
voltage - Simple parallel SMD LED circuit(need help) - Electrical Engineering Stack Exchange
5 PACK 0805 SMD RGB FAST to SLOW COLOR CHANGER Pre-Wired with Resistors for 9-12v and Lead Wires
Replace smd led with resistor? More info in comments : r/AskElectronics
dimming - Question on Resistors for use with 5050 LED Strips - Electrical Engineering Stack Exchange
LED Resistor Calculator with SMD LEDs - Apps on Google Play
LED Calculator. Calculation of Current-Limiting Resistors for a Single LED and LED Arrays • Electrical, RF and Electronics Calculators • Online Unit Converters