The TW635-3D Optoma projector lamp replacement comes with a genuine original 230 watt Osram brand bulb inside rated at 3,500 lumens (brightness equal to the original Optoma lamp). 

The TW635-3D lamp has a rated life of 3,000 hours (6,000 hours in eco-mode).  This lamp has superior brightness and lamp life than other cheaper generic replacement lamps being sold elsewhere.  Purchase with confidence from Pureland Supply with free ground shipping and a 180 day warranty.