The Solis Tek 400W MH SE 4K Daylight Lamp is a single‑ended metal halide grow bulb intended for use with compatible 400‑watt HID ballasts and standard horticultural reflectors. The 4K (approx. 4000 K) color temperature provides a balanced white spectrum suited to vegetative growth and general-purpose lighting. Solis Tek markets its MH line with low‑iron glass to enhance UV transmission compared with standard bulbs. Typical working area for a 400‑watt MH lamp is about 100 x 100 cm with a suitable reflector and hanging height, making it a good fit for small grow tents and mother/veg spaces. This lamp draws 400 watts at the ballast and installs like other SE HID bulbs. Check ballast compatibility and ventilation before use.
