This photo is taken towards the end of the rudra abishekam. You can see that the lingam (center) has been decorated with flowers and the green leaves of the bilva tree are scattered around the base of the lingam. Over the lingam you see a copper container decorated with orange marigold flower malas, into which water is poured so that it will drip slowly and steadily onto the lingam.
Another interesting difference between a Varanasi temple like this one, and the southern temple style is that here the lingam is quite low and the priests are seated around it. In the south the lingam would be in a sanctum and elevated quite a bit higher up as you see in the following photo.
