Using a ceramic-sealed and water cooled hollow cathode D. C. discharge setup, vacuum ultraviolet (VUV) spectral radiations in range of 120-200nm for the He H2 and N2 gases have been investigated. The relative radiation intensity as a function of the discharge current (100-600mA) and the influence of the gas pressure on it have been shown. This experiment shows that the VUV line radiation belongs to the helium ion and nitrogen atom. It was found that there is only one maximum value in the hydrogen line radiation with the variation of the He gas pressure, but in the He II line radiation there are two maximum values with the variation of the Helium gas pressure. An obvious decrease of the radiation output for H2 band spectrum has appeared with an addition of He in H2 gas.