Solar Pulse
From Lexicanum
A Solar Pulse is part of the Necron Armoury and may only be used by the Necron Lord within the Necron army. The Lord's staff releases a flash of blinding light that illuminates the entire battlefield as if the sun had risen for a moment.
Dawn of War
In the PC game Dawn of War: Dark Crusade the Solar Pulse is a artifact that may be researched in the Forbidden Archives building. When used, a small and concentrated point of pulsing green light appears that blinds enemy units. Enemies are able to walk through the pulse without any affect, but they are not able to fire their weapons either within or through it (to represent the blindness). This effect has to be countered by either waiting until it disappears, walking around it (as its area of effect is limited), or walking through it to get to the other side.
Its is very effective against Tau players/races as they are a predominantly a shooting oriented army and the loss of this ability is a serious detriment to their long range power. Necrons are unaffected by the solar pulse.
