[citation][nom]drwho1[/nom]"The evolution in illumination engines and light source technology is migrating from traditional lamp-based light sources to LED and laser technologies, which will enable a lower cost of ownership as well as more compact and portable designs."Right...But at what cost?[/citation]
They have a higher up-front cost, but then the lamps typically will never need to be replaced, or else only replaced once over the life of the projector. From what I have read (I have yet to play with one yet) they give off better image quality, use much less power, and the break-even point on cost for a 6hr day (like a classroom) is ~2-3 years after you figure in the costs of bulbs. And that is only considering the cost of bulbs and power... it is stupidly expensive to get a janitor to break out a ladder and change a lightbulb.