Lekos are the ultimate light for specials and other weird lighting situations. You will be able to tell them apart because they have a complicated lens system, are somewhat longer than the fresnels, and have a set of four shutters around the middle that let you do cool things to the outbound light.
If you need to light an aisle, but not the audience, or perhaps just a single light on a throne, these are the lights you want.
These require very special bulbs, so you will need to figure out bulbs on your own, be advised that one of the two older Lekos has a problem where it will look like the bulb is burned out, but what really is happening is that the socket the bulb goes into is messed and and you will need to better seat the bulb in it.