Home > Products > Festoon LED > SV7 7mm (T6.5) Festoon LED Bulb | 28-42mm Sun Visor Light
SV7 7mm festoon LED bulb with clear PC tube and SMD 2835 chips studio display
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SV7 7mm festoon LED bulb with clear PC tube and SMD 2835 chips studio display
7mm ultra slim festoon LED bulb illuminated white light front perspective
SV7 festoon LED bulb pair standing display with pointed cone nickel terminals
SV7 festoon LED bulb 28mm to 42mm multi size comparison with clear PC sleeve
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Cross Reference / Direct Replacement
SV7, SV7-8, T6, T6.5, C5W (7mm), 6614F, 6612F, 6615F, 6641F, 7065, TS-14V1C, DE3428, GLB239, GLB254, GLB269, 28mm Festoon, 31mm Festoon, 36mm Festoon, 39mm Festoon, 42mm Festoon

SV7 7mm (T6.5) Festoon LED Bulb (28-42mm) - Single-Sided PC Tube (12V / 24V)

Ultra-slim Φ7mm SV7 festoon LED bulb series available in 28mm, 31mm, 36mm, 39mm, and 42mm lengths. Powered by 3 to 6 high-efficiency SMD 2835 LEDs inside a shatterproof clear PC tube with single-sided 120° forward projection. Operating at 12V/24V (0.5W–1W), it is the ideal plug-and-play upgrade for vehicle sun visor vanity mirrors, glove boxes, dome reading lamps, and marine gauges.
Product Model:S7-3-6L
Socket / Base:Festoon SV7 (7mm Cap Diameter, Pointed Cone Terminals)
Available Lengths:28mm, 31mm, 36mm, 39mm, 42mm (Universal Φ7mm Outer Diameter)
Operating Voltage:12VDC / 24VDC (Custom 6V, 36V, 48V Available on Request)
Power Consumption:0.5W (28/31/36mm with 3 LEDs) / 1.0W (39/42mm with 6 LEDs)
Luminous Flux:50 LM (3-LED Models) / 100 LM (6-LED Models)
Color Temperature:6500K Xenon White / 4500K Neutral White / 3000K Warm White
LED Emitters:3× to 6× High-Efficiency SMD 2835 LEDs (Single-Sided Beam, Ra ≥ 80)
Enclosure / Body:Shatterproof Clear Optical Polycarbonate (PC) Tube with Nickel-Plated End Caps
Beam Orientation:120° Directional Single-Sided Forward Projection (100% Useful Interior Light)
Primary Uses:Car Sun Visor Vanity Mirror, Glove Box, Map Reading Dome, Boat Courtesy & Instrument Gauges
Cross-Reference:SV7, SV7-8, T6, T6.5, C5W (7mm), 6614F, 6612F, 6615F, 6641F, 7065, TS-14V1C, DE3428, GLB239, GLB254, GLB269, 28mm Festoon, 31mm Festoon, 36mm Festoon, 39mm Festoon, 42mm Festoon
Quality & Warranty:CE (EMC Compliant), RoHS | 2 Years Factory Warranty
Factory B2B Terms:Standard: from 5 pairs | Custom Packaging: Packaging run MOQ 5,000 pcs (pre-funded and drawn down across repeat orders)
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  • Product Details

Overview: Ultra-Slim Φ7mm Festoon Architecture for Precision Compact Illumination

The S7-3-6L series is an ultra-miniature Φ7mm SV7 Festoon LED bulb specifically designed to replace hard-to-fit incandescent fuse and torpedo bulbs in compact interior compartments. Engineered with a specialized single-sided directional beam pattern, all emitted light is focused forward at a 120° angle toward the target area, eliminating the 50% wasted backward glare common to conventional 360-degree cylindrical bulbs.

Protected by an impact-resistant, shatterproof optical polycarbonate (PC) tube, the internal high-CRI SMD 2835 LEDs (CRI Ra >= 80) and solid-state constant-current driver components are fully shielded against mechanical vibration, humidity, and accidental finger contact during installation. Available in 5 standardized lengths (28mm, 31mm, 36mm, 39mm, and 42mm), the S7-3-6L provides a 100% drop-in retrofit across automotive, marine, and electronic instrument applications.

Technical Dimension Blueprint & Vehicle Interior Demonstration

7mm SV7 LED bulb installed in vehicle interior reading lamp and roof console
Interior Reading Lamp Demonstration
Even, glare-free ceiling and map light illumination without hot spots
SV7 7mm festoon LED bulb 28mm length dimension and 3 SMD 2835 LEDs closeup
28mm Ultra-Slim Profile
Exact 7mm tube diameter with 3x SMD 2835 chips for sun visor vanity mirrors
SV7 festoon LED bulb dimensional blueprint 28mm 31mm 36mm 39mm 42mm technical drawing
Full Dimensional Blueprint
Technical specifications across 28mm, 31mm, 36mm (3-LED) and 39mm, 42mm (6-LED)

Comprehensive Application Guide: Automotive, Marine & Instrument Lighting

Due to its distinctive ultra-slim Φ7mm diameter and pointed cone SV7 end caps, the S7-3-6L excels in applications where standard Φ8.5mm or Φ10mm festoons cannot fit:

  • Automotive Sun Visor Vanity Mirrors: The primary OEM application for 28mm and 31mm SV7 bulbs across European, American, and Japanese vehicles (Mercedes, BMW, Audi, VW, Ford, Toyota).
  • Glove Compartments & Console Storage: Provides crisp 6500K white or 4500K neutral light inside narrow dash storage housings without generating heat.
  • Overhead Map Reading & Dome Lights: Directional single-sided forward output directs 100% of the lumens downward into the cabin rather than absorbing into the housing reflector.
  • Marine Boat Courtesy & Gauge Lights: Corrosion-resistant nickel end caps and sealed PC tube make it ideal for boat step courtesy lights, instrument cluster backlighting, and companionway illumination.
  • Vintage Audio Receivers & Electronic Gauges: Widely adopted by audio enthusiasts to replace burnt-out 8V / 12V fuse-style dial lamps in classic stereo receivers and analog meters.

Core Engineering Advantages

  • Single-Sided High-Efficiency Beam: Concentrates illumination strictly forward, maximizing lux on the reading plane while consuming minimal battery power (0.5W to 1.0W).
  • Shatterproof Optical PC Tube: Unlike brittle incandescent glass bulbs that shatter during clip insertion, the impact-resistant PC sleeve ensures safe, tool-free installation.
  • High Color Rendering Index (CRI Ra >= 80): Accurately reveals skin tones in vanity mirrors and renders interior leather and upholstery in natural fidelity.
  • 12V & 24V Universal Compatibility: Available in 12VDC for passenger vehicles/boats and 24VDC for commercial truck cabins and industrial equipment. Custom voltages (6V, 36V, 48V) can be custom-manufactured.

Cross-Reference & Replacement Compatibility

The S7-3-6L is universally compatible with compact festoon and fuse sockets labeled under:

SV7 SV7-8 T6 T6.5 C5W (7mm) 6614F 6612F 6615F 6641F 7065 TS-14V1C DE3428 GLB239 GLB254 GLB269 28mm Festoon 31mm Festoon 36mm Festoon 39mm Festoon 42mm Festoon

Frequently Asked Questions

What is the difference between an SV7 festoon bulb and a standard SV8.5 (C5W) festoon?
The key difference is the end cap and tube diameter: SV7 bulbs feature an ultra-slim 7mm cap diameter with sharper conical ends, designed specifically for tight sun visor vanity mirrors, glove boxes, and instrument dials. Standard SV8.5 festoon bulbs (C5W) have an 8.5mm to 10mm diameter and will not physically snap into compact SV7 spring clips.
Why is the single-sided directional beam advantageous for interior and visor lights?
Traditional 360-degree cylindrical bulbs waste more than half their light reflecting uselessly into the opaque back of the lamp housing. Our single-sided design directs 100% of the 50–100 lumen output forward where it is needed, providing brighter illumination at only 0.5W–1.0W power draw while preventing interior housing heat accumulation.
Which vehicle and equipment applications use 28mm vs 31mm/36mm lengths?
The 28mm and 31mm lengths are most frequently used in sun visor vanity mirrors (BMW, Audi, Mercedes, VW, Toyota, Ford) and glove box compartments. The 36mm, 39mm, and 42mm models are commonly used in overhead dome map lights, trunk cargo lamps, boat courtesy steps, and vintage audio receiver backlighting.
What is the factory B2B sample policy and custom OEM packaging MOQ?
We provide factory testing samples from 5 pairs with immediate dispatch. For custom private-label brand packaging (blister cards, custom color gift boxes), the standard packaging production run is 5,000 pcs, pre-funded by the customer, stored in our warehouse, and drawn down across repeat production orders.