Fan Noise & Thermal Management
A 300 W COB at 70% output can whisper or whine depending on fan PID tuning and whether the driver lives in the head or a floor ballast. Food and beverage photographers recording behind-the-scenes audio care; so do agency clients on set. We publish distance-weighted dBA at 1 m, 50% and 100% output, plus thermal throttle points that show up as slow brightness droop during long catalog days.
Articles in this pillar
- COB LED Fan Noise in the Studio: SPL, PID Curves, and Client-Facing Sets
Measure COB fan noise at 1 m, understand why 50% dim can be louder than 100%, and pick heads for hybrid photo/video bays without guessing dBA.
Related shootouts
- Aputure 120d II vs Godox SL150II: product photography 2026
- Nanlite Forza 150 vs Godox ML60II: tabletop 2026
- Amaran 200d S vs Godox LA200D: color accuracy 2026
Other pillars
FAQ
Room-treated closet, 1 m on-axis, ambient subtracted, C-weighted slow. We report both 50% and 100% PWM because some brands tune aggressively at mid power.
Sometimes via firmware “quiet” modes that cap output — we note effective lumens loss in each review. Passive heat-sink lights (Nanlite Forza 60B class) trade max output for silence.
Yes for cable management and heat. Godox VL300-style split heads move fan noise off the modifier pole but add floor clutter — see our Aputure 300d II vs Godox VL300 fan noise comparison.
Unlikely for stills unless you shoot live audio on set. It can distract clients; we flag > 35 dBA at 50% as “conversation-competitive.”