{ "id": "h4-halogen-headlight-bulbs", "sku": "h4-halogen-headlight-bulbs", "title": "H4 Halogen Headlight Bulbs (2 Pack)", "slug": "h4-halogen-headlight-bulbs", "price": 60.99, "currency": "SGD", "availability": "in_stock", "category": "headlights", "category_label": "Headlights", "tags": [], "colors": [], "materials": [], "dimensions": null, "weight": null, "images": [ "https://myauto.asia/dropship-images/headlights/h4-halogen-headlight-bulbs/main-h4-halogen-headlight-bulbs.jpg", "https://myauto.asia/dropship-images/headlights/h4-halogen-headlight-bulbs/h4-halogen-headlight-bulbs-2.jpg" ], "description_short": "Two 12 volt, 60/55 watt bulbs with a 5000K light colour, supplied as a pair so both sides of the car are replaced together.", "description": "The slow fade nobody notices\n\nHeadlight bulbs rarely die in a dramatic way. They fade. A bulb that has been working for a few years puts out less light than it did when it was new, and because the change happens gradually, your eyes go along with it. You start driving a little slower on unlit roads. You lean forward at junctions. You tell yourself the roads are darker than they used to be.\n\nThen one bulb fails outright, and standing in front of the car you can suddenly see the difference between the two sides. The old bulb looks dull and faintly yellow next to the empty socket you are about to fill. That comparison is the real reason people start hunting for the best h4 halogen headlight bulbs they can get hold of quickly.\n\nThis pack contains two bulbs with the H4 fitting, rated at 12 volts and 60/55 watts, with a listed colour temperature of 5000 Kelvin. That is the whole specification, and this guide is about helping you work out whether those numbers match what your vehicle needs.\n\nWhat the H4 fitting actually is\n\nH4 is not a brightness level or a quality grade. It is a description of the physical and electrical interface between the bulb and the vehicle: the shape of the base, the position of the three locating tabs on the flange, and the three-pin connector at the back.\n\nWhat makes H4 distinctive is that it carries two filaments in one glass capsule. One filament handles the dipped beam, the shorter pattern you use in traffic. The other handles the main beam, the long reach you switch on when nothing is in front of you. A small metal shield sits inside the bulb to shape the dipped beam so it does not throw light straight into the eyes of oncoming drivers.\n\nBecause of that dual-filament design, a single H4 bulb does the job that two separate bulbs do on some other systems. It also explains the two-part wattage figure. The 60 watt number is main beam, the 55 watt number is dipped beam.\n\nYou will also see the same fitting written as 9003 or HB2 in parts lists and on packaging. These are naming conventions used in different places, and the base is the same. If your old bulb has any of those three markings, this pack has the right shape.\n\nReading the numbers on the box\n\n12 volts. This is the vehicle system voltage. Cars and most motorcycles run on 12 volt electrics. Trucks, buses and some commercial machinery run 24 volt, and they need bulbs built for it. Using the wrong voltage bulb is not a minor mismatch, so confirm this first if you are working on anything larger than a car.\n\n60/55 watts. This is how much power each filament draws. It is the common rating for H4 and matches the wiring most vehicles with this fitting are built around. A bulb that draws more than the circuit expects is asking for trouble with connectors and wiring.\n\n5000 Kelvin. This is a colour description, not an output figure. Lower numbers on the Kelvin scale look warm and yellow. Higher numbers look cool and white, and higher still starts to look blue. At 5000K the light reads as a clean white. It is a tone many drivers prefer because road signs and lane markings tend to look sharper under it than under a warm yellow beam.\n\nOne point worth being blunt about: a colour temperature figure tells you nothing about how much light a bulb makes. If anyone sells you a bulb purely on its Kelvin number, they are selling you a colour, not a beam. We list the figure because it is a real specification, not because it is a performance claim.\n\nWho this bulb suits\n\nThe straightforward case is someone replacing a failed or tired H4 bulb with another H4 bulb. If you have read the marking on the old one and it says H4, 9003 or HB2, and your vehicle is 12 volt, the fitting lines up.\n\nIt also suits anyone who keeps a boot kit stocked. A spare headlight bulb is one of those items that costs little and saves a great deal of inconvenience if a bulb goes while you are far from a shop. Buying the best twin pack headlight bulbs you can and keeping the pair together means you have a matched set when you need them.\n\nWho it does not suit: anyone whose vehicle takes a different fitting, anyone running 24 volt electrics, and anyone set on LED. The light source here is halogen, which works by heating a filament inside a gas-filled quartz capsule. That is a different technology from LED, and we are not going to pretend otherwise.\n\nChecking the fitting before you buy\n\nThere are two reliable ways to check, and one unreliable one.\n\nThe first reliable way is the owner manual. Look for the headlight row.\n\nThe second reliable way is the bulb itself. Open the bonnet, remove the rubber dust cover behind the headlight, unplug the connector, release the clip, and take the bulb out. The marking is stamped on the metal base or printed on the plastic collar. Hold it up to the light if the print is faint.\n\nThe unreliable way is guessing from the shape of the headlight unit or from what a friend with a similar car uses. Manufacturers change bulb specifications across model years and across trim levels, and two cars that look identical from the outside can take different bulbs.\n\nIf you have checked and you are still unsure, ask us. Send the marking you can read and we will tell you honestly whether this bulb matches it.\n\nFitting it without drama\n\nStart with the engine off, the ignition off and the headlights off. Give an old bulb time to cool. Halogen bulbs run very hot, and a bulb that has just been switched off will burn you.\n\nAccess varies more than the job itself does. Some vehicles give you a clear reach behind the headlight unit. Others want the battery box, the air intake or the washer bottle out of the way first, and a handful need the whole headlight unit removed. Have a look before you commit, and if the space is impossible, a workshop will do the swap quickly.\n\nThe one rule that matters most is simple. Do not touch the glass with bare fingers. Skin oils leave a residue on the quartz, and when the bulb heats up, that spot gets hotter than the surrounding glass. It can shorten bulb life. Hold the bulb by its base or its plastic collar. If you do touch the glass by accident, clean it with a cloth and a little methylated spirit before fitting.\n\nLine up the three tabs on the flange with the notches in the reflector. The bulb only goes in one way round. Seat it fully, secure the clip, refit the connector, replace the dust cover properly so water cannot get in, then test both dipped and main beam before you close the bonnet.\n\nKeeping the light good\n\nBulbs are only half the story. A clouded or yellowed headlight lens will throw away a chunk of the light your bulbs produce, and no new bulb will fix that. If the plastic on the front of your headlights has gone hazy, a restoration kit or a professional polish is usually a better use of money than a bulb upgrade.\n\nCheck the dust covers at the back of the headlight units are seated properly, because moisture inside the housing dulls the reflector over time. Give the lenses a wipe when you clean the car. And if the beam looks wrong after a change, have the aim checked, since badly aimed headlights dazzle oncoming drivers and leave the road in front of you darker than it should be.\n\nKeep the spare bulb in its box. Loose in a toolbox, a bulb gets crushed or the pins get bent, and you find out at the worst moment.\n\nThe short version\n\nThis is a pair of H4 halogen headlight bulbs, 12 volt, 60/55 watt, with a 5000 Kelvin light colour. There are two in the pack so you can change both sides together and keep the light even.\n\nIt replaces an H4 bulb only, which is also written as 9003 or HB2. Check the manual or the marking on the old bulb before you order. We do not claim fitment for any named vehicle, and we do not claim any approval marking for this bulb, so if you need an approved one, check your old bulb and talk to us first.\n\nHandle it by the base, let the old one cool, and fit both sides while you are in there.", "llm_summary": "The H4 Halogen Headlight Bulbs (2 Pack) product is a pack of two H4 halogen headlight bulbs, sold as a pair. The H4 fitting is also listed as 9003 or HB2. Each bulb is rated 12 volts at 60/55 watts, with 60 watts on the main beam filament and 55 watts on the dipped beam filament. The stated colour temperature is 5000 Kelvin, a white-leaning light tone. The light source is halogen. The bulb replaces an H4 fitting only, and buyers should confirm the fitting in the owner manual or on the old bulb before ordering. No approval marking is claimed for this bulb. Bulbs get very hot in use and the glass should not be touched with bare fingers.", "returnable": true, "return_policy": "Change-of-mind returns accepted for 15 days from purchase under this shop's own published policy: original packaging, proof of purchase, buyer pays return postage. Faulty or misdescribed goods are repaired, replaced or refunded with return postage covered by the shop, and rights under Singapore consumer protection law, including the Consumer Protection (Fair Trading) Act are unaffected.", "shipping_profile": "standard", "warranty": null, "brand": "Online Auto Company", "gtin": null, "mpn": null, "condition": "new", "url": "https://myauto.asia/h4-halogen-headlight-bulbs/", "canonical_url": "https://myauto.asia/h4-halogen-headlight-bulbs/", "json_url": "https://myauto.asia/api/products/h4-halogen-headlight-bulbs.json", "updated_at": "2026-11-11", "compare_at_price": 72.99 }