The Origin of the HID Bulb The first commercial automotive HID bulbs were first introduced in 1991, as an option on the BMW 7-series. This first system used an unshielded, non-replaceable bulb designated D1 - a designation that would be recycled years later for an entirely different type of bulb. The AC ballast was about the size of a building brick. The first American-made effort at HID headlamps was on the 1996-98 Lincoln Mark-VIII, which used reflector headlamps with an unmasked, integral-ignitor bulb made by Sylvania and designated Type 9500. This was the only system to operate on DC; reliability proved inferior to the AC systems. The Type 9500 system was not used on any other models, and was discontinued after Osram's takeover of Sylvania. All HID headlamps worldwide presently use the standardized AC-operated bulbs and ballasts. What do the different letters and numbers used to identify the bulb mean? The 'D' stands for discharge, the numbers (1, 2, 3 or 4) designate the type while the last letter ('R' or 'S') is used to determine what kind of application the bulb is meant to be used in. The 'R' - D1R, D2R, D3R, D4R, D5R, D6R, D7R & D8R - These types of bulbs have an opaque shield covering specific portions of the bulb because they are intended for use in specifically designed reflector headlamp optics. 'R' burners tend to have 300‒400 less lumen than their 'S' counterparts. The 'S' - D1S, D2S, D3S, D4S, D5S, D6S, D7S & D8S -These types of bulbs are unobstructed by any kind of bulb shield because they are designed for use in projector headlamp optics. 'S' bulbs tend to emit 300‒400 more lumen than their 'R' counterparts.
My car had D8S 25W and i replaced them (and the ballast) with D1S 35W. On the D1 a cut out (Dremel job) was needed at 1:30 (45°) to fit into the headlight. The new bulb does has Mercury in it. Much better lights now.
The Origin of the HID Bulb
The first commercial automotive HID bulbs were first introduced in 1991, as an option on the BMW 7-series. This first system used an unshielded, non-replaceable bulb designated D1 - a designation that would be recycled years later for an entirely different type of bulb. The AC ballast was about the size of a building brick. The first American-made effort at HID headlamps was on the 1996-98 Lincoln Mark-VIII, which used reflector headlamps with an unmasked, integral-ignitor bulb made by Sylvania and designated Type 9500. This was the only system to operate on DC; reliability proved inferior to the AC systems. The Type 9500 system was not used on any other models, and was discontinued after Osram's takeover of Sylvania. All HID headlamps worldwide presently use the standardized AC-operated bulbs and ballasts.
What do the different letters and numbers used to identify the bulb mean?
The 'D' stands for discharge, the numbers (1, 2, 3 or 4) designate the type while the last letter ('R' or 'S') is used to determine what kind of application the bulb is meant to be used in.
The 'R' - D1R, D2R, D3R, D4R, D5R, D6R, D7R & D8R - These types of bulbs have an opaque shield covering specific portions of the bulb because they are intended for use in specifically designed reflector headlamp optics. 'R' burners tend to have 300‒400 less lumen than their 'S' counterparts.
The 'S' - D1S, D2S, D3S, D4S, D5S, D6S, D7S & D8S -These types of bulbs are unobstructed by any kind of bulb shield because they are designed for use in projector headlamp optics. 'S' bulbs tend to emit 300‒400 more lumen than their 'R' counterparts.
Noup both wrong... R is for reflector S is for projector
Correct. Soooo many people don't know.
D = "Discharge"
N° = 1,2,3,4 is the type
S is for projector
R is for reflector
So why do my Sirius and Light Force reflector lights use D1S bulbs? You would think they would use D1R.
The R has a shield to produce the cut-off line and the S has non
@@AboodAlmodhi So the R is a low beam bulb?
@@moestrei both are for low beam there's a non factory car with a hid high beam
My car had D8S 25W and i replaced them (and the ballast) with D1S 35W. On the D1 a cut out (Dremel job) was needed at 1:30 (45°) to fit into the headlight. The new bulb does has Mercury in it. Much better lights now.
The gas inside, that makes the difference between R and S!
It can be used and replace these bulbs between them 1/1 without any problems!