The HLG 30 UVA XL from Horticulture Lighting Group (HLG) is a high-performance UV-A supplement bar optimized for enhancing indoor grow setups. This 30‑watt UVA light emits wavelengths centered around 365 nm and 385 nm, a spectrum scientifically shown to stimulate increased production of terpenes, flavonoids, and resin in flowering plants, while also helping strengthen their natural defenses against pests and pathogens. With a 50,000-hour lifespan and a waterproof, passive-cooled design, it's built to last and operates quietly without fans. The “XL” model is notably longer, about 39.4 in (1 m) in length, making it ideal for larger grows ranging from 4×4 to 5×5 ft tents. It’s designed for easy bolt-on installation using the existing screw or clamp points on these fixtures, or it can be independently mounted over any grow space. But if you’re thinking about another more powerful or a different lighting system, then check out the HLG 650R or even the HLG Scorpion Diablo V2.
