The type of base used in the lamp.
The base is the contact part of the lamp, which is fixed in the socket and is responsible for fixation, electrical connection and the possibility of safe removal. Thus, the type of base directly determines compatibility with a particular cartridge. However, in addition to this, there is also such a parameter as the base of the base. It determines primarily the contact configuration used on a particular base. And in our paragraph it is written as the second value.
In lamps for different purposes (see above), the set of bases used is very different. So, for the head light the following options are used:
D1S,
D1R,
D2S,
D2R, D3S , D3R,
D4S,
D4R,
H1,
H2,
H3,
H4,
H7,
H8,
H9,
H10,
H11,
H13,
H15,
H16..., H27W /1, H27W/2, HB1, HB3, HB4, HB5, HIR2, HS1, M5, R2. For markers and other similar lights, in particular, C5W, C10W, C15W, H21W, H6W, P21W, PY21W, P21/4W, P21/5W, P27/7W, PR21W, R5W, R10W, T4W, W5W, WY5W, W16W are used , W21W, WY21W, W21/5W.
If desired, you can find a detailed explanation of each designation in special sources.Luminous flux produced by a car lamp; for dual-mode models like bi-xenon (see “Type”), the value at maximum brightness is indicated.
This parameter characterizes the actual brightness and efficiency of the lamp; it can be used to directly evaluate and compare different models, regardless of their type and power consumption (but only at the same color temperature - see below for more details). The brightest are headlight lamps (see “Purpose”), in them this indicator can
exceed 4000 lm and vary noticeably from model to model. Therefore, when choosing such a lamp, you should pay special attention to the characteristics of the luminous flux. It should be borne in mind that too bright headlights are just as undesirable as too dim ones: high brightness creates not only the risk of dazzling for oncoming cars, but also discomfort for the driver himself. Optimal luminous flux values can be indicated in the documents for the car or for the headlight itself; if such data is not available, you can turn to other special sources.
As for other types of lamps, in models for auxiliary lighting the luminous flux is up to 800 lm, and in lamps for the instrument panel - up to 55 lm. Moreover, in both cases, the brightness is selected by the manufacturer taking into account the specific specialization and location of the lamp, so in such models this parameter is not a key one.
