While searching for LED grow lights you will find three common types of LEDs: large arrays of 1 W LEDs, clusters of 3 W LEDs and some models feature 5 W LEDs.
1 W LEDs are well-suited for shelf growing, or crops like lettuce and spinach and other various herbs green leafy herbs, can only be inches away from the light source. 1 W LEDs evenly spaced on aluminum substrates offer medium priced indoor hydroponic lighting solutions.
One watt, LED Growbars
3 W HB (high brightness) LEDs
3 W LEDs dominate today’s grow lights for good reason, these incredibly bright, ultra efficient,LEDs deliver intense and focused, spectrum specific “digital sunlight”
PowerBloom uses 3 watt LED modules
5 watt LEDs have excellent horticultural applications, where lights need to be mounted up to 20 feet above growing area. 5 W LEDs run extremely high temperatures, proper thermal management is quite challenging with these larger high powered arrays.