Grow Lights for Vegetable Seed Starting Closets: Lumen and Kelvin Values Fully Explained: TRG 2015


Understanding Lumen and Kelvin numbers is essential for growing healthy seedlings for transplants. Lumens is the brightness or intensity of a bulb. You want a lumen number between 2000 and 3000. Kelvin is the color of the light. The higher the kelvin number the closer it is to Natural Light. You want a kelvin number between 4100 and 6500. Keep in mind you may not find the perfect bulb as they vary in availability. However, there is a nice range that is effective for germinating vegetable seeds and growing vegetable transplants.

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