fins 410 of the side panels 404 may be seen the mounting pins 302 are also shown in fig6 fig7 is a side cross sectional view of the light engine shown in fig4 in accordance with a second embodiment of the present invention different from the embodiment illustrated and described with reference to fig5 the heat bridge includes heat conduction pipes 702 in fig7 a first end of the heat conduction pipes 702 is connected to the mounting board 412 and a second end of the heat conduction pipes 702 is connected to one of the panels either the side panels 404 or the top panel 406 each of the heat conduction pipes 702 serves to transfer heat from the mounting board 412 to the one of the panels fig8 is bottom view of the light engine shown in fig4 and fig9 is a side view of the light engine shown in fig4 in accordance with an embodiment of the present invention the lower panel 408 the heat dissipation fins 41 0 and the mounting pins 402 may be seen in fig8 fig1 is an end cross sectional view of the light engine shown in fig7 in accordance with an embodiment of the present invention the side heat conduction pipes 702 may be clearly seen joining the mounting board 412 to each of the side panels 404.