A device for cooling LED modules (30, 41) of an LED lamp, wherein the device comprises the LED modules (30, 41) and wherein the device comprises a feed line (1, 21) for feeding a fluid and several heat exchangers (5, 25, 31) connected to the feed line, wherein several LEDs are arranged at each heat exchanger (5, 25, 31) and are coupled to the heat exchangers (5, 25, 31) with respect to heat transfer, so that the LED modules (30, 41) can be cooled by the fluid, characterised in that the device comprises a discharge line (2, 22) for discharging the fluid, wherein the feed line (1, 21) and the discharge line (2, 22) are connected to one another in a fluid-tight manner via a respective L-piece (4, 24) at one of their ends and additionally via at least one T-piece (3, 23) in the feed line (1, 21) and at least one T-piece (3, 23) in the discharge line (2, 22), or the feed line (1, 21) and the discharge line (2, 22) are connected to one another in a fluid-tight manner via an L-piece (4, 24) at the end of the feed line (1, 21), said L-piece (4, 24) being connected to a T-piece (3, 23) in the discharge line (2, 22), and via an L-piece (4, 24) at the end of the discharge line (2, 22), said L-piece (4, 24) being connected to a T-piece (3, 23) in the feed line (1, 21), or the feed line (1, 21) and the discharge line (2, 22) are connected to one another in a fluid-tight manner via an L-piece (4, 24) at the end of the feed line (1, 21), said L-piece (4, 24) being connected to a T-piece (3, 23) in the discharge line (2, 22), and via an L-piece (4, 24) at the end of the discharge line (2, 22), said L-piece (4, 24) being connected to a T-piece (3, 23) in the feed line (1, 21), and additionally via at least one T-piece (3, 23) in the feed line (1, 21) and at least one T-piece (3, 23) in the discharge line (2, 22), so that the fluid flows spatially separated from the LEDs and so that the feed line (1, 21) and the discharge line (2, 22) have at least two fluid connections that are connected in parallel, wherein the heat exchangers (5, 25, 31) are arranged in the fluid connections or the heat exchangers (5, 25, 31) are the fluid connections, and that the device has a modular design and wherein one LED module (30, 41) comprises two L-pieces (4, 24), and at least one further LED module (30, 41) comprises two T-pieces (3, 23), or two LED modules (30, 41) comprise one L-piece (4, 24) and one T-piece (3, 23), and/or at least one further LED module (30, 41) comprises two T-pieces (3, 23), and wherein the LED modules (30, 41) additionally comprise a fluid connection to a heat exchanger (5, 25, 31), wherein the LED modules (30, 41) are connected to one another via feed line parts (1, 21) and discharge line parts (2, 22). the device comprises a discharge line (2, 22) for discharging the fluid, wherein the feed line (1, 21) and the discharge line (2, 22) are connected to one another in a fluid-tight manner via a respective L-piece (4, 24) at one of their ends and additionally via at least one T-piece (3, 23) in the feed line (1, 21) and at least one T-piece (3, 23) in the discharge line (2, 22), or the feed line (1, 21) and the discharge line (2, 22) are connected to one another in a fluid-tight manner via an L-piece (4, 24) at the end of the feed line (1, 21), said L-piece (4, 24) being connected to a T-piece (3, 23) in the discharge line (2, 22), and via an L-piece (4, 24) at the end of the discharge line (2, 22), said L-piece (4, 24) being connected to a T-piece (3, 23) in the feed line (1, 21), or the feed line (1, 21) and the discharge line (2, 22) are connected to one another in a fluid-tight manner via an L-piece (4, 24) at the end of the feed line (1, 21), said L-piece (4, 24) being connected to a T-piece (3, 23) in the discharge line (2, 22), and via an L-piece (4, 24) at the end of the discharge line (2, 22), said L-piece (4, 24) being connected to a T-piece (3, 23) in the feed line (1, 21), and additionally via at least one T-piece (3, 23) in the feed line (1, 21) and at least one T-piece (3, 23) in the discharge line (2, 22), so that the fluid flows spatially separated from the LEDs and so that the feed line (1, 21) and the discharge line (2, 22) have at least two fluid connections that are connected in parallel, wherein the heat exchangers (5, 25, 31) are arranged in the fluid connections or the heat exchangers (5, 25, 31) are the fluid connections, and that the device has a modular design and wherein one LED module (30, 41) comprises two L-pieces (4, 24), and at least one further LED module (30, 41) comprises two T-pieces (3, 23), or two LED modules (30, 41) comprise one L-piece (4, 24) and one T-piece (3, 23), and/or at least one further LED module (30, 41) comprises two T-pieces (3, 23), and wherein the LED modules (30, 41) additionally comprise a fluid connection to a heat exchanger (5, 25, 31), wherein the LED modules (30, 41) are connected to one another via feed line parts (1, 21) and discharge line parts (2, 22).