COB LED Car Interior Reading Light Bulbs – T10 W5W BA9S Festoon Universal Fit

Dim, Yellow, Flickering — Your Car's Interior Lighting Is Letting You Down

You reach into the back seat in the dark and can barely see what you're looking for. You check your map or a document at night and the overhead light barely illuminates the page. You park in a dark car park and the interior light gives you just enough glow to fumble with your keys before it cuts out. The factory-fitted incandescent bulbs in most vehicles were designed to a cost, not a standard — and the result is interior lighting that is dim, yellow, slow to reach full brightness, and prone to burning out at the worst possible moment.

The COB LED Car Interior Reading Light Bulbs solve this problem completely. Available in 16, 24, and 48 LED configurations, these bulbs replace your existing interior, dome, reading, and festoon lights with crisp, bright white COB LED illumination that reaches full brightness instantly, draws a fraction of the power of incandescent alternatives, and lasts tens of thousands of hours longer. With three adapter types included — T10 (W5W/194), BA9S, and Festoon (31mm, 36mm, 39mm, 41mm) — a single set covers virtually every interior light fitting found in modern and classic vehicles.

Why COB LED Is the Right Technology for Car Interiors

COB — Chip on Board — is a LED packaging technology that places multiple LED chips directly onto a single substrate, creating a dense, uniform light source with no dark spots, no hot spots, and no visible individual diodes. The result is a smooth, even spread of light that illuminates the entire interior of your vehicle rather than creating a bright centre with dim edges.

Compared to standard SMD LED bulbs, COB LEDs produce more lumens per watt, generate less heat, and have a longer operational lifespan. Compared to the incandescent bulbs fitted as standard in most vehicles, the difference is transformative: brighter light, whiter colour temperature, instant-on performance, and a lifespan measured in years rather than months.

The 3W power draw of these bulbs means they place minimal load on your vehicle's electrical system — important for vehicles where interior lights are left on accidentally, and for classic or older vehicles with less robust electrical systems.

Universal Fit — Three Adapters, One Set

The most common frustration when upgrading car interior bulbs is compatibility. Different vehicles use different fittings, and even within a single vehicle, different light positions may use different bases. This set eliminates that problem by including three adapter types in the box:

T10 (W5W/194) — the most common fitting for side marker lights, number plate lights, and some reading lights. BA9S — a bayonet fitting used in many European vehicles for interior and instrument lighting. Festoon (31mm, 36mm, 39mm, 41mm) — the elongated tube fitting used for dome lights, boot lights, and overhead reading lights in the majority of passenger vehicles.

Between these three adapter types, this set is compatible with the interior lighting of virtually every passenger car, van, and light commercial vehicle on the road. Check your vehicle's existing bulb type against the list above — if it matches any of these fittings, these bulbs will fit.

Choose Your LED Count — 16, 24, or 48 LEDs

The three variants in this range offer different levels of brightness to suit different applications and preferences. The 16 LED variant is ideal for smaller light positions — glove box lights, footwell lights, and number plate lights — where a focused, moderate output is appropriate. The 24 LED variant suits most standard dome and reading light positions, providing a significant upgrade over incandescent without being overwhelming. The 48 LED variant is the choice for large dome lights, boot lights, and any position where maximum illumination is the priority.

All three variants operate at 12V and are compatible with standard automotive electrical systems. No resistors, no load equalisers, and no additional wiring are required for most vehicles — simply remove the existing bulb, fit the appropriate adapter, and install the LED unit.

Specifications

Brand: Qujuzawa | Item Type: Reading / Interior Lights | Interface Types: T10 (W5W/194), BA9S, Festoon (31mm, 36mm, 39mm, 41mm) | LED Counts: 16, 24, 48 | Wattage: 3W | Voltage: 12V | Colour: White | Vehicle Compatibility: Universal | Origin: Mainland China