А-21
![](https://old-lighting.ru/sites/default/files/styles/lamp_drawing/public/pictures/catimages/2018/03/24/img14-5.jpg?itok=T7OQa7OC)
![](https://old-lighting.ru/sites/default/files/styles/lamp_drawing/public/pictures/catimages/2018/03/24/img14-5.jpg?itok=T7OQa7OC)
Encyclopedia chapter: Automotive incandescent lamps
Power (W): ![](data:image/png;base64,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)
![](data:image/png;base64,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)
Luminous flux (lm): ![](data:image/png;base64,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)
![](data:image/png;base64,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)
Luminous intensity (cd): ![](data:image/png;base64,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)
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAOCAYAAAAWo42rAAAA00lEQVQokY3RoUpEQRiG4WeHDYsYhCkGoygYRCxWi3FuwOIVmLSYxSSrTa16C+cibLsY9Ao2iacYNs5YZuHsIsv5ysD8L9/8LzMopeiT0IvqgqFtNteBg1KK0Db3uK533/jFOMf0stq4XYc3OMMlnkPb3C7AYT3fMc0xPdQ1vjDHaOnpzp67OEfCAfZzTLMlmZrTCh1h1p0vZEYIOaZ5bT7GKyY5potu4yemoW2GkGOa4BGHq9Yb2MNObdzCVW1dsj7BHT5C2/xU2zc8/Wu9Lr3/+g96NkHnDA9gEQAAAABJRU5ErkJggg==)
Average life (h): ![](data:image/png;base64,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)
Diameter (mm): ![](data:image/png;base64,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)
Length (mm): ![](data:image/png;base64,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)
Cap/base type: ![](data:image/png;base64,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)
See also: А 6-21+3
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