400-LED Cool White String Lights — Black Cable

Elegant cool white string lights with memory-hold function — ideal for festive, indoor, or outdoor decoration.

400 cool white LEDs on a black cable — includes memory-hold feature and 32V indoor power supply.

Power supply (included): 32 V, 3.6 W — must remain indoors

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Product overview

Add a modern, frosty glow to your décor with these 400 cool white LED string lights. The subtle black cable blends into dark surfaces for a sleek appearance. The lights feature a memory-hold function that remembers your last lighting mode after switching off. Designed for both indoor and outdoor decorative use — the power supply must remain inside or within a dry, weather-protected area.

Technical specifications

Item	Specification
LED count	400 LEDs (cool white)
Cable color & type	Black cable
Power supply (included)	32 V, 3.6 W — indoor use only
Lamp specification (each LED)	3 V, 0.015 W
Total electrical power (calculated)	400 × 0.015 W = 6.0 W
Cable length (end-to-end)	5.00 m
Length from 1st bulb to last bulb	23.94 m
Lighting effect	Steady glow with optional modes and memory-hold function
Recommended use	Indoor and sheltered outdoor decoration, trees, railings, façades

Important: The calculated LED load (6.0 W) exceeds the included 3.6 W power supply rating. Please use a compatible 32 V adapter rated for at least 6 W to ensure full brightness and safe operation. Always keep the power supply indoors or inside a dry enclosure.

Key features

• 400 bright, energy-efficient cool white LEDs.
• Stylish black cable — ideal for dark surfaces or night displays.
• Memory-hold function retains your preferred lighting mode after power off.
• Long LED span of 23.94 m for extended coverage.
• Low-voltage operation (32 V) for energy safety and efficiency.
• Power supply must remain inside — not waterproof.

Installation & safety

1. Uncoil the lights and check the 23.94 m LED span before installing.
2. Use clips or hooks suitable for string lighting; avoid piercing the cable.
3. Keep the 32 V adapter indoors or inside a weatherproof enclosure.
4. Do not overload; if connecting multiple sets, ensure your power supply supports the total wattage.
5. Disconnect before handling or adjusting the lights.

SKU: STRING-400-CW-BLACK

Suggested uses: indoor trees, windows, pergolas, fences, party and festive lighting.