DEPO 1151119LLDM BULB
Product Specifications
Product quality
OEM Equivalent Grade
Wholesale price USD
$46.01
Wholesale price CNY
¥312
bolt MOQ (Minimal order)
1 pcs
local_shipping Production time
45-50 days
package_2 Shipping Weight:
—
swap_horiz
Application (cross references) 1
expand_more
| DEPO | 1151119LLDM |
Overview & Operating Principle
▲
The BULB is a halogen headlamp bulb — a tungsten incandescent light source operating inside a fused quartz capsule filled with a halogen gas mixture (typically iodine or bromine combined with argon and nitrogen) that produces the high-luminous-flux beam required for the vehicle's main beam, dipped beam, or fog lamp lighting functions. The halogen cycle is what distinguishes a halogen bulb from a conventional incandescent: tungsten atoms evaporated from the filament's hot surface during operation react with the halogen gas to form a tungsten halide compound that remains in vapour form throughout the capsule volume; when this vapour reaches the hottest filament surface (above 2,500 K), the halide compound decomposes and redeposits the tungsten back onto the filament, dramatically slowing the filament's wear rate compared to a vacuum bulb of the same operating temperature. This halogen regeneration cycle allows the filament to operate at significantly higher temperatures — and therefore higher luminous efficacy — than a conventional bulb could sustain, producing the bright white-yellow light at around 3,200 K colour temperature that defines the halogen headlamp's optical character. The bulb's base — an internationally standardised connector type such as H1, H4, H7, H11, HB3, or HB4 — provides precise mechanical alignment of the filament position relative to the headlamp reflector's focal point; the filament must be located within 0.1–0.2 mm of the designed focal position to produce the correct beam cut-off pattern and intensity distribution.
This unit — DEPO 1151119LLDM — is manufactured to OEM-equivalent specifications: base type and pin configuration matching the international standard for the application (H1, H4, H7, H11 or other), rated voltage (typically 12V or 24V), rated wattage (45–65W depending on application and function), filament position tolerance relative to the base reference plane, luminous flux output, colour temperature, and rated service life are matched to the original part. Supplied as an individual bulb or in dual-pack matched-output configuration where applicable. Available wholesale from 46.01 USD, MOQ 1 pcs, production lead time 45-50 days.
Halogen headlamp bulbs fail through filament fracture at end-of-life from accumulated tungsten loss — the filament eventually becomes too thin at its hottest point and breaks; through thermal shock fracture when the bulb is operated at full voltage from cold in extreme low temperatures — the sudden temperature gradient cracks the quartz capsule; through fingerprint contamination during installation where skin oils on the quartz surface cause uneven thermal expansion that fractures the capsule on the first heat cycle; and through vibration fatigue fracture of the filament support wires on vehicles in heavy off-road or commercial use where sustained vibration loads exceed the bulb's design tolerance.
Symptoms & Diagnostics
▲
Single headlamp function completely dark — low beam, high beam, or fog lamp absent on one side while the opposite side and all other functions operate normally — the bulb's filament has fractured at end-of-life or from thermal shock; confirm by removing the bulb and visually inspecting the filament — a broken filament is clearly visible as a discontinuity in the coiled tungsten wire, often with one end visibly displaced or dropped to the bottom of the quartz capsule.
Headlamp beam noticeably dimmer than the opposite side on the same function — beam intensity and throw distance reduced despite the filament confirmed intact — the bulb is approaching end-of-life as accumulated tungsten loss has reduced the filament cross-section and increased its electrical resistance, reducing current draw and luminous output; the bulb may also show a darkened band on the inside of the quartz capsule from deposited tungsten; replace before complete filament failure occurs.
Both headlamps on the same function fail simultaneously or within a few days of each other — the lamps are at the same point in their service life — halogen headlamp bulbs accumulate identical operating hours on both sides and reach end-of-life at similar times; this matched-pair failure pattern is normal and expected at the bulb's rated service life; replacing both bulbs simultaneously at the first failure prevents the short follow-up failure of the second bulb.
Visible darkening or blackening on the inside surface of the quartz capsule — typically as a band or patch opposite the filament position — advanced filament wear has produced tungsten deposition on the quartz at temperatures below the halogen regeneration threshold; the deposited tungsten blocks light output and absorbs heat that further accelerates degradation; replace the bulb regardless of whether the filament has yet broken — the deposition will progress to filament failure within a short period.
Bulb that fails within a short period of installation — significantly before the rated service life — thermal shock fracture from contaminated quartz; fingerprints, dust, or grease on the quartz surface absorb heat unevenly during operation, creating localised thermal stress that fractures the capsule; or excessive voltage from a charging system overcharging the battery, which dramatically shortens halogen bulb life; check charging voltage and confirm the bulb was installed without contact to the quartz surface.
Bulb that produces a different beam pattern than the opposite side — light scattered above the cut-off line or insufficient throw distance — the bulb's filament position is incorrectly aligned in the base, or the bulb has been installed with the base not fully seated in the headlamp socket; confirm the bulb base type matches the OEM specification exactly and that the base is fully engaged with the socket retaining clip before re-aiming the headlamp.
Logistics & Customs
▲
International HS Code
8539.21
EAEU Customs Code (TN VED)
8539 21 300 0
Typical Net Weight
Country of Manufacture
China
Standard MOQ
1 pcs
Production Lead Time
45-50 days
Always verify the exact 8-digit or 10-digit subheading with your customs broker for the destination country, as tariff schedules and duty rates vary by jurisdiction.
Installation Tips
▲
- Never touch the quartz capsule of a halogen bulb with bare fingers — handle the bulb only by its plastic or metal base — skin oils transferred from fingers to the quartz cause uneven thermal expansion during operation, producing thermal stress that fractures the capsule at the contaminated zone; a fingerprinted bulb may operate normally for several hours before failing catastrophically — sometimes shattering the capsule and damaging the headlamp reflector; if the capsule is accidentally touched, clean it with isopropyl alcohol on a lint-free cloth before installation, or discard the bulb.
- Confirm the bulb base type matches the OEM specification exactly — halogen bulb bases (H1, H4, H7, H11, HB3, HB4 and others) appear visually similar but have different pin geometries, key positions, and electrical configurations; an incorrect base type cannot be forced into the headlamp socket without damaging the socket or the bulb; confirm the base type from the vehicle handbook or from the marking on the bulb being replaced before purchase.
- Engage the bulb's locating key fully into the socket recess before securing the retaining clip — the locating key on the bulb base aligns the filament position correctly relative to the headlamp reflector's focal point; a bulb that is installed with the key not fully seated produces an off-axis filament position that scatters the beam above the cut-off line and reduces effective beam throw distance; confirm the key is fully engaged by pressing the bulb firmly into the socket before applying any retaining clip.
- Replace bulbs in axle pairs simultaneously where possible — both headlamps on the same function (low beam or high beam) accumulate identical operating hours; if one bulb has reached end-of-life, the opposite is at the same wear stage and will fail within a short interval; replacing both simultaneously avoids a second headlamp service within a short period and ensures symmetric beam intensity from both sides for safety and roadworthiness compliance.
- Confirm the headlamp socket connector terminals are clean and undamaged before installing the new bulb — corroded or burned socket terminals produce high resistance at the bulb connection that reduces voltage to the filament and shortens the bulb's service life; in extreme cases the high-resistance connection generates enough heat to melt the bulb's plastic base and the socket housing; inspect the socket carefully and replace the socket pigtail if the terminals show heat damage.
- Install the new BULB (DEPO 1151119LLDM), confirm correct base engagement and retaining clip seating, activate the lamp function and verify correct illumination, confirm the beam pattern from a calibrated alignment screen matches the OEM specification — the cut-off line should be horizontal with the designed step-up to the kerb side, and the centre-beam position should match the opposite side, before returning the vehicle to service.
Tools: clean cotton gloves or a soft lint-free cloth for bulb handling, isopropyl alcohol for cleaning accidentally contaminated capsules, headlamp aim screen for beam verification, electrical contact cleaner for socket terminal cleaning where required.
Frequently Asked Questions
▲
Why do "upgrade" higher-wattage halogen bulbs cause premature wiring and connector damage despite producing brighter output?
High-wattage replacement bulbs labelled as 100W or 130W draw current significantly above the wiring harness and socket designed capacity. The headlamp circuit's wire gauge, fuse rating, switch contact rating, and socket terminal current rating are all sized for the OEM bulb wattage — typically 55–65W for low beam and 60–70W for high beam — with a small safety margin. A 100W bulb draws approximately 50% more current than the circuit was designed for, generating proportionally more heat at every connection point and inside the wiring insulation. The socket terminals heat to the point where the plastic socket housing melts and the terminal spring tension is permanently lost; the wiring insulation softens and may eventually short to ground; the headlamp switch contacts arc beyond their rated capacity. The correct path to brighter headlamps is to use higher-output OEM-wattage performance bulbs (such as Philips X-tremeVision or Osram Night Breaker) which use improved filament technology to produce more light at the rated wattage, not higher-wattage substitutes. ok.parts supplies OEM-specification and performance-upgrade halogen bulbs at wholesale MOQ from 46.01 USD per unit.
Is it safe to install LED retrofit bulbs in halogen headlamp housings as a direct replacement?
LED retrofit bulbs fitted into headlamp housings designed for halogen sources produce a beam pattern that is significantly different from the original halogen output and is typically not road-legal in markets that apply ECE or DOT lighting regulations. The halogen filament is a precise point light source positioned at the reflector's focal point; an LED retrofit bulb has multiple emitters at different positions and a heat sink that obstructs reflector apertures, producing scattered light above the cut-off line that dazzles oncoming drivers. The vehicle will fail roadworthiness inspection in regulated markets where retrofit LED bulbs are fitted to housings not designed for them. Some markets and some specific vehicle-bulb combinations are now permitted under recent regulatory updates — but the general rule is that the headlamp housing must be type-approved for the light source fitted. The correct path to LED headlamps is to replace the complete headlamp assembly with one designed and type-approved for LED operation.
How does the OEM-equivalent aftermarket unit compare to the genuine OEM part?
OEM-equivalent units in this catalogue replicate the current OEM design geometry and material specification. Quality is verified against OEM cross-reference data. When ordering in bulk, confirm with our team that the specification matches the latest OEM revision for your application.
Is white-label or custom packaging available for wholesale orders?
Yes. ok.parts works directly with the manufacturing facility and can accommodate neutral white-label packaging or fully branded packaging with your company logo, part numbers, and barcode. Minimum order quantities and lead times for custom packaging may differ from standard stock. Contact the team via the inquiry form to discuss your specific requirements.
Frequently Replaced Together
▲
| Part | Reason for Combined Replacement |
|---|---|
| Matched Pair Bulb (Opposite Side) Same type and rating — axle pair | Halogen headlamp bulbs on the same function accumulate identical operating hours; when one bulb has failed at end-of-life, the opposite has reached the same wear stage and produces noticeably reduced output even if it has not yet failed completely. Replacing both bulbs as a matched pair restores symmetric beam intensity from both sides — which is both a roadworthiness compliance requirement in regulated markets and an immediate safety benefit by ensuring equal illumination of both sides of the road ahead. |
| Bulb Holder / Socket Pigtail Application-specific connector and wiring | A socket that has been carrying current to a degraded bulb at gradually increasing resistance has been heat-stressed and may have developed terminal corrosion or contact arcing. A socket with darkened or heat-discoloured plastic produces a high-resistance connection that shortens the new bulb's service life by reducing the voltage available to the filament. Inspect the socket terminals after removing the failed bulb and replace the socket pigtail if the terminals show any heat damage or terminal corrosion. |
| Headlamp Aim Adjustment Service procedure — labour only | Bulb replacement provides the natural opportunity to verify and correct the headlamp beam aim on a calibrated alignment screen. Headlamp aim drifts gradually over the vehicle's service life from suspension settling, body sag from age, and impact loads from kerb strikes; a vehicle whose headlamps have not been re-aimed in several years typically has a beam cut-off position that is too low, reducing effective throw distance, or too high, dazzling oncoming traffic. Re-aiming after bulb replacement restores the designed beam coverage at minimal additional service time. |