The invention provides a lamp comprising LED lamp filaments and an illuminating device comprising the lamps. The lamp comprising the LED lamp filaments comprises a shielding shell, a base, an electric conductor and an LED light-emitting body, wherein the shielding shell is filled with heat-dissipating protective gas; an opening in the bottom of the shielding shell is closed through the base; the electric conductor extends out of the base; the LED light-emitting body is electrically connected with the electric conductor; and the heat-dissipating protective gas includes dibromomethane at a minimum. By means of the lamp comprising the LED lamp filaments and the illuminating device comprising the lamps, heat dissipation efficiency of the lamp comprising the LED lamp filaments is improved; the service life is prolonged; vibration resistance is improved; and product reliability is improved.