COB LED Strip 400 front view with high density LED chips and uniform dot free lighting
COB LED Strip 400 used for under cabinet lighting with uniform dot free illumination
COB LED Strip 400 dimension drawing showing PCB width cutting length and technical specifications
COB LED Strip 400 close up showing high density LED chips and dot free uniform illumination
Cuttable COB

HST-COB400 COB LED Strip 400LEDs/m Ultra-Slim 3mm

Ultra-slim 3mm COB LED strip with 400 LEDs/m for the narrowest profiles. 7W/m power with 10mm/20mm micro-cutting and CRI 90+ dot-free output.

Specifications

Model
HST-COB400
LED Type
COB
LED Density
400 LEDs/m
400 LEDs/m
3 mm
Voltage
12V / 24V DC
Power
7 W/m
Color Temperature
2700K / 3000K / 4000K / 6500K
CRI
Ra 90+
IP Rating
IP20
Cutting Unit
10 mm / 20 mm
HST-COB400 is a 3mm ultra-slim COB LED strip delivering 400 LEDs/m on the narrowest commercially available flexible PCB — engineered for lighting designers who need dot-free illumination inside profiles where standard 8mm strips physically cannot fit.

Key Specifications

Parameter
Value
Model
HST-COB400
LED Type
COB
LED Density
400 LEDs/m
PCB Width
3 mm
Voltage
12V / 24V DC
Power
7 W/m
Color Temperature
2700K / 3000K / 4000K / 6500K
CRI
Ra 90+
IP Rating
IP20
Cutting Unit
10 mm / 20 mm
Beam Angle
180°
Lifespan
50,000 hours
Selection Tip: Use with 4mm–6mm internal-width aluminum profiles. For outdoor or wet-area projects, request our IP-rated narrow COB variants.

Why Choose HST-COB400

  • 3mm narrowest width — fits inside 4mm and 6mm aluminum profiles where no other COB strip can go
  • 400 LEDs/m dot-free output — maintains continuous, seamless illumination despite extreme miniaturization
  • 10mm/20mm micro-cutting — precision trimming to exact length without dark gaps at profile ends
  • Tighter bending radius — the 3mm PCB flexes more easily into tight curves and radiused profiles than wider alternatives
  • CRI 90+ color rendering — accurate color representation even at this compact form factor

Typical Applications

  • Under-cabinet kitchen lighting in narrow 6mm profiles
  • Furniture-integrated lighting (bed frames, shelving, wardrobe interiors)
  • Glass shelf edge lighting in retail display cases
  • Curved architectural details with tight bending radii
  • Miniature signage and channel letter backlighting

Quality & Trust

The HST-COB400 uses the same premium COB phosphor technology as HSTLight's standard-width strips, ensuring spectral consistency across the product family. CE and RoHS certified.

Get a Quote

Working with tight-space constraints? contact us with your profile dimensions and quantity. Request a sample to verify the perfect fit in your aluminum channel.

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