Tu-154 is equipped with several devices to warn you of your altitude, though. Including TAWS.
http://www.uasc.com/products/taws.aspx
Even with a completely dark runway, the pilot should not have been so low.
The lightbulb theory really isn’t going to explain the crash, imo.
http://www.airliners.net/photo/Poland-—Air/Tupolev-Tu-154M/1221062/L/
You can see the updated avionics including the TAWS display in this photo of the cockpit of the Polish Tu-154.