Using Sensor Data to Activate a 5V Relay on the Arduino - Circuit Basics
Fun with Arduino 05 Connect Multiple LEDs with a Relay or a FET – Fun with Arduino
1 Channel Relay Shield Module, 10PCS DC 5V Indicator Light LED Module for Arduino R3 MEGA 2560 1280 ARM PIC AVR STM32 Raspberry Pi MCU DSP Official Boards Shield (10PCS): Amazon.com: Industrial
Keyestudio Single 5V Relay Module Compatible with Arduino UNO R3 MEGA
Tutorial: How to control LED by using relay and arduino - YouTube
In-Depth: Interface One Channel Relay Module with Arduino