Subject: What will the effect of the light from the Hourglass Nebula have on earth.

Recently, I was told that laser light from the Hourglass Nebula would be 
reaching Earth between 2002-2005 and the color of this light is green.  The 
supernova 1987a is supposed to impact with an outer ring sometime soon and 
begin heating it up and produce visible results.  If this is true, will it 
affect the atmosphere in any way and what would be the effect of laser light 
bathing our area of space.  Would this be analogous to a photon stream 
intervening between the light of the Sun and the earth and interfering with the 
radiation from the Sun that the earth depends on?  

Re: What will the effect of the light from the Hourglass Nebula have on earth.