The demand for high-power light-emitting diode (LED) lighting shows an increasing trend; however, with the increasing power of blue LED chips, problems such as heat dissipation and light attenuation are increasing as well. To explore high-power LED special lighting, an array-based blue LED is used to excite Ce∶YAG fluorescent crystal using an innovative structural device to output high-lumen-density light on small-area end-faces. Many factors affect LED light emission, such as the absorption of blue light by crystal rods with different doping concentrations, the differing light-emitting effects of high-powered LED excitation for crystal rods with different Ce-ion-doping concentrations, and the influence of end-face treatment of crystal rods upon the light output. The result shows that a substrate made by aluminum nitride satisfies the heat-dissipation requirement of a high-powered LED; the use of crystal rod with a doping concentration of 0.8% and the end-face treatment of the crystal rod can greatly increase luminous flux. The experimental device can output more than 6000 lm of light flux with a lumen density up to 1640 lm/mm ², which can be applied to medium- and high-brightness lighting equipments.