The fabrication of metallic photonic boxes and their emission properties with black-body radiation at high temperatures are reported. Black-body radiation is modified to enhance the visible spectrum using photonic boxes of about 200 nm. With the structure of resonant cavity and the significantly enhanced density of states at specific wavelengths, the enhanced blue light is observed and it has the peak intensity at 400 nm with 90nm spectral width. Other visible spectra can also be enhanced by simply increasing the size of photonic boxes. Due to the high temperature operation, formation of metallic grain on the surface of photonic boxes is also discussed.