Ultra Sun T5 54 Watt HO Lamp 4 Ft Blue 6500K

The 420 provides the most crucial spectrum needed during the vegetative cycle. This high UV A spectrum adds nutrient values that are vital to plant growth and sustainability when combined with the FS+UV. This lamp maximizes the initial growth process because it is a true vegetative light. The Name “420” References The Area Of The Spectrum Produced By This Lamp. The 420 Provides The Most Crucial Spectrum Needed During The Vegetative Cycle. This Lamp Maximizes The Initial Growth Process Because It Is A True Vegetative Light.