While the 9mm is a sufficient light source most of the time, there is a need on darker maps for an additional light source that can be used simultaneously with a primary weapon. (assuming that you aren't a support class using the shotgun as a primary weapon, or a commando with magic healthbars)
I think glowsticks would fill that roll nicely. They would be purchased from the trader and thrown just like grenades. Most glowsticks don't give off too much light, so the dark maps would retain their dark feel, except now you can strategically place light sources to create a faintly illuminated kill-zone that is sufficient enough to at least reveal the silhouettes of your targets.
The glowsticks in Bedlam gives a good impression of what I'm talking about.
I think glowsticks would fill that roll nicely. They would be purchased from the trader and thrown just like grenades. Most glowsticks don't give off too much light, so the dark maps would retain their dark feel, except now you can strategically place light sources to create a faintly illuminated kill-zone that is sufficient enough to at least reveal the silhouettes of your targets.
The glowsticks in Bedlam gives a good impression of what I'm talking about.