"Easy to use with a practical resolution and brightness, the VPL-EX4 should suit all but the most demanding office environment. It also has environmental benefits - with its very low power consumption of 5-Watts in standby mode - along with auto standby selection, making the projector relatively eco-friendly. The only running cost is the lamp. Sony claims a lamp life of around 2000/3000 hours in high/low mode. Replacement lamps cost a not-so-cool 300. There are better projectors on the market for imaging professionals, as well as for those presenting lots of fast-paced corporate videos (the contrast ratio is just 300:1), but the VPL-EX4 looks good and it is actually pretty good value for money - a statement you'll rarely read in a Sony review."