18/6 vs 20/4 for autos in a 1x1 tent (320 W LED)

In a 1x1 m tent with a 320W LED, both 18/6 and 20/4 light cycles work well for autoflowers, but each has its trade-offs. An 18/6 schedule is generally the sweet spot — it’s more energy-efficient, keeps temperatures lower, allows plants a proper rest period, and still delivers strong growth and yields. The 20/4 cycle can push plants slightly harder, offering marginally faster growth and potentially higher yields, but it consumes more electricity, produces more heat, and gives plants less recovery time. Overall, 18/6 is the balanced, reliable option, while 20/4 is for those chasing every last gram of production, although it is not recommended.