reference will now be made in detail to embodiments of the invention . wherever possible , same or similar reference numerals are used in the drawings and the description to refer to the same or like parts or steps . the drawings are in simplified form and are not to precise scale . for purposes of convenience and clarity only , directional ( up / down , etc .) or motional ( forward / back , etc .) terms may be used with respect to the drawings . these and similar directional terms should not be construed to limit the scope of the invention in any manner . fig1 shows an irradiation device 1 as taught by the invention in the vertical position . the irradiation device 1 comprises a carrier system 30 which provides a basic framework of the irradiation device 1 and carries its further components . in the represented embodiment it is designed traversable by means of castors on a foot 30 a of the carrier system 30 . the carrier system 30 has two legs 30 b that essentially extend in a vertical direction from the foot 30 a , which are respectively supported on the foot 30 a by means of a brace 30 c . the legs 30 b together with the foot 30 a form an essentially u - shaped design of the carrier system 30 ( see fig3 and 6 ). each of the two legs 30 b has a bearing 21 on one end facing away from the foot 30 a , in which a first pivot axis 21 is supported . this connects a separate control module 20 pivotable to the carrier system 30 , in which controls for controlling of light heads 11 , 12 , 13 , 14 of the irradiation device 1 , in particular its ballasts , are arranged . the weight of the individual light heads 11 - 14 can therefore be reduced . the control module 20 represented is designed as a control cabinet , which is designed with a longitudinal extension aligned vertically and essentially plate - like with a domed rear side . in the represented embodiment , the control module 20 is suspended by means of the first pivot axis 31 at its center of gravity on the carrier system 30 , and can be pivoted about the first pivot axis 31 . the swiveling motion can be limited in the bearings 21 by stops ( not shown ), for example . preferably , a swiveling motion of the control module 20 from the starting position represented in fig1 is possible with a angle of inclination of 0 ° relative to the perpendicular in a pivoted position pursuant to fig2 with an angle of inclination of 20 °, for example , relative to the perpendicular and / or the starting position for an anatomical and ergonomic adaptation to a patient undergoing radiation . the swiveling of the control module 20 can be performed by means of gearing 24 or 25 . the described control module 20 , designed as a control cabinet , has a first front side 20 a , which in an operating status is facing a patient undergoing radiation . on this front side 20 a , multiple holders 41 , 42 , 43 , 44 are arranged for the detachable connection of the modularly designed light heads 11 - 14 with the control module 20 . the represented light heads 11 - 14 have supporting arms 16 , which on one end of the respective light head facing away have pivot pins for insertion into the holders 41 - 44 . after inserting the pivot pins into the holders 41 - 44 of the control module 20 , the respective light head can be swiveled in a downward motion and be connected with a plug - and - socket device located below the pivot pin for the control module 20 and / or detachably engaged into it ( see fig5 ). in the embodiment represented , four holders 41 - 44 for light heads 11 - 14 are represented , which can be occupied and combined as desired . apart from the illustrated assignment of all four holders 41 - 44 , for example , likewise merely one , two , or three of the holders 41 - 44 can be assigned in any combination , whereby a particularly flexible possibility for combining the light heads 11 - 14 is obtained . a different center of gravity position of the pivotable control module 20 which is created in this context can be supported by the irreversibility of the gearing 24 or 25 . naturally it is also possible to provide a corresponding irradiation device 1 with a larger or lesser number of holders 41 - 44 and light heads 11 - 14 . each of the light heads 11 - 14 includes a casing 15 which can be pivoted about a second pivot axis 17 relative to the respective supporting arm 16 and / or the control module 20 , as a result of which the light heads 11 - 14 can be universally adapted individually for the irradiation of highly different body sections . the irradiation device 1 in addition has a control element 50 for operating the irradiation device 1 , particularly for the central control of the light heads 11 - 14 via the common control element 50 . this can be pivoted about a third pivot axis 53 relative to the control module 20 . the control element 50 can therefore be pivoted and operated in the vicinity of the front side 20 a of the control module 20 pursuant to the fig1 - 3 . alternatively , the control element 50 can be pivoted pursuant to fig4 onto a rear side of the irradiation device 1 . for this purpose , the control element 50 of the irradiation device 1 can be pivoted by at least 180 °. the control element 50 is preferably connected with the control module 20 by means of a swivel arm 51 which is designed to lock into its end positions , so that inadvertent twisting is prevented during operation of the control element 50 . in order to adjust the control element 50 and / or the swivel arm 51 , it must be lifted out of its decent mechanism and can then subsequently be put into a desired position . a negative tilt of the control element 50 in case of a pivoted control module 20 pursuant to fig2 which could theoretically develop , will be obviated by a tilted arrangement of the third pivot axis 53 as well as by a respective construction of the swivel arm 51 . the control element 50 therefore stands at least vertical , even with a tilted control module 20 . any further joints are therefore unnecessary , and the irradiation device 1 can be operated optimally . as previously mentioned , fig2 shows the irradiation device 1 as taught by the invention in a pivoted position 23 . because of the tilt of the control module 20 about an angle of inclination of 20 ° relative to the perpendicular 22 , the light heads 11 and 12 arranged above the bearing 21 move towards a patient who is sitting in front of the irradiation device 1 . the light heads 13 and 14 arranged below the bearing 21 , are swiveled away from the patient , however . in this manner , the described ergonomic adaptation to the respective patient can be performed . with tall patients , for example , the control module 20 can be brought into the pivoted position 23 , whereas with small patients , the control module 20 can be brought into the upright position 22 , since in the upright position 22 the distance of the light heads 13 and 14 is reduced for the irradiation of feet to the light heads 11 and 12 for the irradiation of hands . fig3 shows the irradiation device 1 as taught by the invention from fig1 in a horizontal projection with a folded - out control element 50 , the control panel 52 of which faces into the same direction a like the front side 20 a . in fig4 , the irradiation device 1 as taught by the invention is represented pursuant to fig1 and 3 , wherein the control element 50 is pivoted by 180 ° relative to the position shown in fig3 and is thus arranged on a rear side b of the irradiation device 1 . the control panel 52 is therefore to be operated from the rear side of the irradiation device 1 . fig5 shows a light head 12 as taught by the invention for an irradiation device 1 according to one of the fig1 - 4 in a lateral view in two different pivoted positions 0 ° and 200 °, which are respectively represented by dashed lines . in each case , an emission surface and / or a light exit surface x of the casing 15 serves as a reference surface , which in a starting position 0 ° with a swivel angle 0 ° is directed vertically down and in a position swiveled by 200 ° faces oblique to the top . for this purpose , the casing 15 of the light head 12 can be swiveled relative to its supporting arms 16 about the second pivot axis 17 . it is thus possible to align the light exit surface x also in the case of the swiveled control module 20 level to the top and / or level to the bottom . this will ensure an optimal adaptation to the ergonomics of the patient and the selected form of treatment . preferably , the connection cables for the lamps of the light head arranged in the casing 15 are laid through the second pivot axis 17 as well as likewise preferably led covered in the supporting arms 16 up to its end facing away for connecting the control module ( cabling not shown ). in this manner , the described pivotability of the casing 15 is not impaired by interference through cables . the represented light head 12 has a curved form on its upper side , so that an oblique sloping contour of the casing 15 results with respect to the side surfaces of the casing , which makes it possible to reduce the distances of the light heads to a minimum in the installed state , so that they do not affect each other during pivoting . fig6 shows the irradiation device 1 as taught by the invention with merely one light head 12 . what can be recognized is the essentially u - shaped design of the carrier system 30 as well as the first pivot axis 31 about which the control module 20 is pivoted . as already previously described , the front side 20 a that is facing the patient of the control module 20 has four holders 41 - 44 for holding modularly designed light heads 11 - 14 ( see fig1 ), in which merely the second - from - the - top holder 42 is occupied with a light head 12 . also represented are contact connections 90 for electrical and / or communicative connection of the light heads with the control module 20 for controlling and / or transmission of information . because of the previously described central arrangement of the controls of the light heads in the control module 20 , in particular of the ballasts , the weight of the light heads 11 - 14 can be reduced significantly . therefore units that can be handled well are created , which can be arranged easily on the control module 20 . arranging and removing and / or separating the light heads 11 - 14 from the control module 20 can preferably be performed without tools , so that an extremely flexible system is provided , which can be combined and adapted depending upon the individual requirement for the respective patient . in order to ensure safe operation , the light heads 11 - 14 must be securely attached on the control module 20 preventing them from being disconnected inadvertently . the same is applicable for the electrical connection of the light heads 11 - 14 with the control module 20 . as already previously noted and represented in detail in fig6 - 8 , the casing 15 of a light head is attached to the control module 20 by means of its supporting arm 16 , wherein the supporting arm 16 is inserted into a section of the holder 42 that is designed as a slotted link with one pivot pin each in a left area l 1 and a right area r 1 . because of the rotation point 74 that is formed hereby , the supporting arm 16 , due to the weight of the light head 12 , performs a slewing motion down and automatically engages by means of a locking lever 75 into a lower detent link 71 of the control module 20 , which represents a second section of the holder 42 . this prevents inadvertent detachment of the connection between the light head 12 and / or its supporting arm 16 and the control module 20 . the locking lever 75 preferably drops back into its detent position through its own weight . therefore , the user does not have to lock the light head 12 into place by having to undertake a separate locking step . this rather occurs automatically and can therefore not be forgotten . the force required for plugging - in the contact connection 90 between the supporting arm 16 and the control module 20 is likewise provided through the own weight of the light head 12 , and corresponding contacting is therefore established automatically . the supporting him 16 is preferably designed as a u - shaped component , where the light head 12 is arranged between the two u - legs . the supporting him 16 can accordingly be connected with the control module 20 with its base section connecting the two legs . the contact connection 90 is likewise preferably integrated in the center of this base section of the supporting arm 15 and supported with a cover 91 , thus preventing any contact with the contact connection 90 ( see fig8 , detail c ). for this arrangement it is necessary , however , to use a mating pair of connectors that does not have its own locking mechanism . this means that no separate locking mechanism apart from the detent mechanism of the locking levers has to be disconnected on the contact connection 90 when the respective light head is removed . as represented in fig6 - 10 , the housing 15 of the light head 12 is secured against twisting by means of a toothed lock washer 60 and a detent link 77 in an upper part of the locking lever 75 . in the representative embodiment , merely the locking lever 75 on the right side ( fig7 ) is actually engaged in the detent link 77 , so that it is possible to swivel the light head 12 using only one hand . alternatively , the locking lever 75 of the left side can instead be engaged ( not shown ), or even both , whereas in the last case , a single - handed operation is no longer possible ( both of the last mentioned cases are not shown ). in order to adjust an inclination angle of the casing 15 in the representative embodiment , the locking lever 75 on the right side r 2 is pulled slightly to the top . the detent link 77 releases the toothed lock washer 60 , and the casing 15 can be turned with the other hand . in this instance , the locking lever 75 must be retained , because it draws back into its original position because of its own weight and will cause automatic engagement . in order to enable this mode of operation , the locking lever 75 on the left side l 2 is always disengaged by means of an asymmetric milling 81 on a bushing 80 . this means that the toothed lock washer 60 is not engaged in the detent link 77 . it is mainly provided for use of identical parts , but it could also be omitted or be replaced by components without teeth . the engagement in the lower detent link 71 on the switching element 20 in this case is nevertheless provided on both sides , however . in order to configure the adjustment motion smooth and cushioned , the toothed lock washers 60 can be inhibited on both sides by means of o - rings 82 . the o - rings 82 are pressed against the toothed lock washers 60 by means of a screwed connection of the bushing 80 with the support 83 . fig1 and 12 show the light head 12 according to fig9 and 10 in an unlatched stage of the locking lever 75 and the toothed lock washer 60 . in order to separate the light head 11 - 14 from the control module 20 , both locking levers 75 in the area of the casing 15 are completely pulled to the top . latch lugs 76 which are arranged on an opposite end of the locking lever 75 are removed from the detent link 71 for this purpose . the light head 12 can subsequently be easily lifted away from the control module 20 with a swiveling motion and thereafter be removed from the section of the holder 72 that is formed as a slotted link . because of the represented possibility of unrestricted pluggability and combination options of the light heads and their various embodiments and component parts , in particular uv - a or uv - b sources of radiation , they must be identified at the respective plug - in places with the corresponding component parts . for this purpose , the control module 20 detects the respective light heads 11 - 14 as well as the selected holder . each holder has a coding board 92 that is provided on the control module 20 , so that a unique coding can be assigned . this is performed by means of jumpers , for example , which can be placed correspondingly . in addition , each light head 11 - 14 is preferably equipped with a storage medium 93 , on which the light head 11 - 14 specifications are stored in duplicate . these specifications include the component parts of the lamp , for instance , intensity , operating time of the respective light head as well as its serial number . each light head is therefore uniquely identifiable . this information is transmitted by means of a bus line in freely definable time intervals or during docking onto the control module 20 , for example . having described at least one of the preferred embodiments of the present invention with reference to the accompanying drawings , it will be apparent to those skills that the invention is not limited to those precise embodiments , and that various modifications and variations can be made in the presently disclosed system without departing from the scope or spirit of the invention . thus , it is intended that the present disclosure cover modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents .