Step 1 : Download the file attached.
Step 2 : Locate your minecraft.jar (Use Start > Run > type %appdata% > bin)
Step 3 : Open minecraft.jar with winzip/winrar
Step 4 : Go to misc folder
Step 5 : Replace the pumpkinblur.png inside the misc folder with your downloaded one.
AND YOU ARE DONE. JUST WEAR YOUR PUMPKIN LIKE A HELMET AND EVERYTHING WILL LOOK GREENISH. This in turn will turn dark objects brighter. But side effect is you look stupid with it. Lol. ITS WORTH IT.
[attachment deleted by admin due to data loss]