ViewSonic RLU-150-001 Projector Lamp For PJ500 PJ501 PJ650
Price: $359.99
The brightness of the PJ501 still stands out today blasting out 1500ANSI lumens, which is plenty of power for the standard consumer. Watching movies and television is painless on the eyes as it is bright enough even when some ambient light is present. The brightness does not fade even after years and maintenance is very low. The lamp lasts for 2000 hours and is low wattage therefore is more efficient and uses less energy. The resolution for the PJ501 makes up for the contrast by providing HDTV capability of up to 1080i and a native resolution of 1024×768p. It is weight less than 5 lbs and it’s very easy to mount into your ceiling.

Optoma Lamp 90day EP738
Price: $259.99

Optoma EP738

The EP738 offers a remarkably bright picture boasting 1800 ANSI lumens and a contrast ratio of 2000:1. Optoma has been able to take advantage of the entry level market by saving a little on quality, while still offering what customers want in a projector. Lamp life for the Optoma EP738 is quite basic at 2000 hours and, if you are ready to run your machine in eco-mode and give up brightness you can widen that up to 3000 hours. Do not expect to be wirelessly networking with this machine, because that would be an expensive feature that is not present on this projector. However, you do have the option of spending more on a better lenses and upgrading the quality of your picture.

INFOCUS REPLACEMENT LAMP FOR LP650
Price: $498.99

The Infocus LP650 was one of the first projectors to use the technologically advanced 250 watt projector lamp. The alternate current projector lamp operates at a higher wattage than any projector lamp before it and therefore can produce a brighter image. The alternate current projector lamps, simply cannot withstand enormous power required to run performance projectors. Many users give evidence to the amazing clarity and brightness of the Infocus LP650 even when operating the projector in well-lit or daylight flooded rooms.

Overall, the Infocus LP650 projector and projector lamp deliver. While there may be some small complaints about the unit malfunctioning or freezing up, most of these are because the unit is overheating due to lack of maintenance and care. Infocus will certainly retain their market share with phenomenal products like the LP650.

Source: http://www.myprojectorlamps.com/reviews.html