A lamp, in particular for the use in potentially explosive areas, has at least one illuminant, one cooling device for the illuminant and one lamp enclosure with a light emission opening, whereby at least the illuminant and the cooling device are arranged in the lamp enclosure. To improve a heat transmission from the illuminant, in particular from the cooling device to the lamp enclosure, in a simple and safe way without the additional use of a heat-conducting paste or the like, whereby respective manufacturing tolerances that can negatively influence a good thermal contact shall no longer be considered, the cooling device for heat transmission to the lamp enclosure has a longitudinally variable cooling element or is formed as such.
1. A lamp, in particular for use in potentially explosive areas, with at least one illuminant, a cooling device for the illuminant and a lamp enclosure with a light emission opening; the lamp enclosure in which at least the illuminant and the cooling device are arranged, characterized in that the cooling device for heat transmission to the lamp enclosure has a cooling element having a length that is longitudinally variable independent of an arrangement of the at least one illuminant, and characterized in that the cooling element extends between a cooling body of the cooling device on which the at least one illuminant is disposed and an enclosure part.
2. The lamp according to claim 1 , characterized in that the cooling element is formed as a cooling spring.
3. The lamp according to claim 1 , characterized in that the cooling element is formed as a telescopically extendable cooling element.
4. The lamp according to claim 1 , characterized in that the cooling element comprises a plurality of cooling elements arranged on different sides of the cooling body between said cooling body and the enclosure part.
5. The lamp according to claim 1 , characterized in that the cooling element is retrofittable.
6. The lamp according to claim 1 , characterized in that the cooling body is longitudinally variable.
7. The lamp according to claim 1 , characterized in that the cooling body has two meshing cooling body parts that can be displaced in relation to each other while a heat transmission contact is maintained.
8. The lamp according to claim 7 , characterized in that the two meshing cooling body parts are spring-loaded in a direction of separation of the cooling body parts.
9. The lamp according to claim 7 , characterized in that the two meshing cooling body parts have a retention device to limit a length variation in a direction of separation to ensure a meshing between the meshing cooling parts.
10. The lamp according to claim 1 , characterized in that the cooling element has cooling surfaces on its ends to fit closely with the associated enclosure part and/or with the cooling body.
11. The lamp according to claim 10 , characterized in that a heat transmission medium is arranged between the cooling surfaces and/or the cooling element and the enclosure part and/or cooling body.
12. The lamp according to claim 10 , characterized in that the cooling surfaces are replaceable.
13. The lamp according to claim 1 , characterized in that the illuminant has a single LED or a plurality of LEDs.