Review on OPTOMA Technology Replacement Projector Lamp for TX542/EX542/TX540/GT360/GT720/ES523ST/EW533ST/GT700/TX542-3D PRO450W/PRO180ST (BL-FP180E) - High-Quality Lamp Replacement for Optimal Projection Performance by Danny Nedumaran

I bought this item to replace my GT700 and it didn't even last 2 weeks. I also got a huge black spot covering most of the screen as described in another review. I'm currently under warranty so we'll see how Dynamic Lamps handles this process, hopefully it lasts longer when I get a new one. What a problem! Spend the extra money and get a better lamp.