Spider Farmer SF4000 Dimmable Full Spectrum LED Grow Light

The 2026 SF4000 has transitioned from Samsung LM301H diodes to premium Bridgelux high-efficiency LEDs — a trusted U.S.-based diode brand. The upgrade increases total diode count and optimizes the layout so each LED operates under lower load, improving thermal stability and extending the light's overall lifespan. Output, uniformity, and PPE (2.7 µmol/J) remain consistent with the previous generation.

The SF4000 is designed for mid-to-large indoor grows. It covers a 5'×5' footprint during vegetation and a 4'×4' footprint during flowering. For best results, pair it with a 4'×4' tent for flower or a 5'×5' tent for veg, and a compatible 6-inch inline fan for airflow management.

Yes. The SF4000's full spectrum output — 3000K, 5000K, 660–665nm red, and IR 760nm — covers every stage from seedling to harvest in a single fixture. The 3000K provides warmer, reddish light and the 5000K delivers cooler, blue-leaning output for vegetative growth. The 660nm red and IR 760nm wavelengths are particularly effective during bloom, accelerating flowering time and boosting yields with deep canopy penetration.

The SF4000 features an upgraded dimming knob and light switch that let you freely adjust intensity at any point during the grow cycle — useful for dialing in your DLI target at each stage. It also supports multi-light unified dimming, so you can connect multiple SF4000 units and control their intensity together from a single point — ideal for commercial rooms and larger tent setups.

The SF4000 draws 450W ±5% and operates on a wide AC100–277V input range, making it compatible with standard Canadian (120V), international (240V), and other outlets worldwide. At 120V it draws 3.787A; at 240V, 1.864A. The efficient Bridgelux design delivers up to 50% energy savings over traditional HPS systems of comparable coverage.

No. The SF4000 uses a passive aluminum heatsink with no internal fan, operating at a true 0dB noise level — completely silent. There are no moving parts to wear out or fail. In hot environments (particularly during summer), it's good practice to run a 6-inch grow tent ventilation fan to maintain suitable ambient temperatures for your plants, but the light itself generates no noise.

Spider Farmer's 5-year warranty covers manufacturing defects and component failures that occur under normal operating conditions — including premature LED degradation and electrical component faults. The warranty does not cover physical damage, user error, or operator abuse. For warranty claims or support, contact Spider Farmer directly through their official support channels.