You can switch to deferred in the Camera settings.
When you enable this option, Volumetric Lights will compute the lighting applied to the opaque objects receiving the light from the volumetric effect and make them visible as with regular lights. You can mix this option with others like translucency.
Note 1: only opaque objects can be lit using this option.
Note 2: you can choose between additive or blend mode in this section. The blend mode requires deferred rendering path and is a bit slower than the additive mode.