HLD MODULE WITH IMPROVED COOLING OF A LUMINESCENT BODY

The invention provides a light generating system (1000) comprising: -a plurality of k light sources (10) configured to provide light source light (11), wherein k is a natural number of at least 5, wherein the light sources (10) are configured in an array (15), wherein the light sources (10) have inter-light source distances (d1); -an elongated luminescent body (100) having a length (L), the elongated luminescent body comprising one or more side faces (140), the elongated luminescent body (100) comprising a radiation input face (111) and a radiation exit window (112), wherein the radiation input face (111) is configured in a light receiving relationship with the plurality of light sources (10), wherein the elongated luminescent body (100) comprises luminescent material (120) configured to convert at least part of light source light (11) into luminescent material light (8), wherein the radiation exit window (112) has an angle (α) unequal to 0° and unequal to 180° with the radiation input face (111); -a body holder structure (2000), wherein the body holder structure (2000) comprises an elongated slit (205) for hosting the elongated luminescent body (100), wherein the elongated slit (205) comprises one or more slit side faces (2140); -n force applying elements (1300) configured to keep the elongated body (100) pushed against at least one of the one or more slit side faces (2140) of the elongated slit (205), wherein n is a natural number selected from the range of 0.01*L/mm-0.05*L/mm, wherein the length (L) is in mm, wherein n is at least 1, and wherein the inter-light source distance (d1) at the n force applying elements (1300) is larger than an average inter-light source distance (d1).