Sansi’s A21 15W LED Grow Light Bulb is a compact full‑spectrum lamp for supplemental plant lighting. In an A21 form factor with E27 base, it uses the company’s chip‑on‑ceramic design to improve thermal conduction and reliability. The frosted lens spreads light with a 120° beam angle and produces a measured PPF of 27.2 µmol/s; PPFD is about 130 µmol/m²/s at 1 ft, suitable for seedlings or small houseplants at close range. Typical color temperature is 4000 K daylight. The bulb measures approximately 72×126 mm and weighs about 0.15 kg. Rated lifetime is 25,000 hours. This model is sold for EU/UK sockets; similar PAR and A‑series options exist for other regions. Use several bulbs to expand coverage or increase intensity.
