First, with cultivation licenses limiting the square footage of facilities, the pressure to grow as much as possible in a given room has caused cultivators to innovate. In addition to multiple tiered rooms, bright lighting grows more weight, making the most out of confined spaces. There’s also pressure in the market to grow high THC strains, which are more likely to be bought by customers. Total Active Cannabinoid (TAC) content has been pushing up over 30% in recent years, and continues to rise. While there are several ways to increase cannabinoid production, ranging from genetic choice, nutrients, temperature, and spectrum manipulation, brighter rooms tend to produce more potent plants.