Note that you won't get any "halo" effect this way. The object will glow and light up surrounding areas, but it won't get any fuzzy halo to "show" that it's glowing.

IF the glowing halo is what you're after together with the actual lights, I'd suround the pyramid with a slightly bigger duplicate made almost transparent and also with ambient on

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.