I have only tried epdm liner, so I have no help there. As for lights,
the OASE lights are really nice. Espcially the Lunaqua if you are
looking for more of an area light. I also have a underwater flood
light from Malibu that works quite nice. Picked it up at HomeDepot
for somewhere around $25 - $30 and it hooked right up to my existing
landscape lighting transformer.