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Similar US bulb: HB2 (9003) 12V: ECE nominal luminous flux: 1,650 / 1,000 lm ±15% Available with P45t base to upgrade old headlamps designed for R2 bulb H7 1 12 V: 55 W 24 V: 70 W PX26d USA, Japan 12V: ECE nominal luminous flux: 1,500 lm ±10% H8 1 12 V: 35 W PGJ19-1 USA ECE nominal luminous flux: 800 lm ±15% H8B 1 12 V: 35 W PGJY19-1 USA H9 1
Download as PDF; Printable version; ... Pages in category "Automotive lamps" ... List of automotive light bulb types;
That is the original version. P15d-25-1 is the bulb's base (formally called the 'cap'). P = prefocus, 15 = minor diameter, d = two electrical contacts, 25 = major diameter, 1 = variant. M5 is the other bulb standard, it's halogen, and they seem to be compatible so I'm using that one. They aren't in the ECE 37. I dunno about H6.
The incandescent light bulb was for a long time the only light source used in automotive lighting. Incandescent bulbs are still commonly used in turn signals to stop hyper-flashing of the turn signal flashers. Many types of bulbs have been used. Standardized type numbers are used by manufacturers to identify bulbs with the same specifications.
DIN 72552 is a DIN standard for labeling the electric terminals in automotive wiring. The most frequently used labels are listed in the table below. The most frequently used labels are listed in the table below.
Under ECE Regulation 37, which governs automotive filament lamps in most of the world, the H1 lamp's nominal rating is 55 W at 12 V, and its test rating is 68 W (maximum) and 1550 ± 15% lumens at 13.2 V. R37 also contains provisions for 6 V, 55 W and 24 V, 70 W H1 lamps. [1]
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Filament type (axial vs. transversal) is interesting to know, since the best type for distant light projection is the axial type. Tranverse filament types usually render inferior light patterns, but could be useful when a wide pattern is desired (as in fog light headlamps).
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