In order to compare the thermal distribution of the 2 LED package types, the COM and COB packages were set inside a 150×150 mm2 aluminum heat-sink, as shown in Fig. 6(a), and a uniform 1 A current input. The illuminated state of the LED was then captured through a thermal imaging camera to examine the temperature distribution of each package. The light emitting area maximum temperature (spot 1) of the COB package, shown on the left of Fig. 6(b), was 120 °C, while the COM package central area maximum temperature shown on the right was 97.6 °C. This shows that the COM package was about 22 °C less distributed in comparison to the COB package. To compare the optical characteristics of the COM and COB package type specimens, an input current of 1 A was applied and the variation in spectrum and color coordinates according to the driving time was compared. As shown in Fig. 7, although the spectrums at the initial stages of the input current application are similar, it was found that the spectrum change with the duration of driving time was greater for the COB package. A spectrum change implies a change in the illuminated color during the LED operation.