Four Lights

I've come up with a few theories for the four lights on the cover of the Division Bell:

1. Four lights = four dots in p . u . l . s . e?

2. I notice there are four symbols on the spine of p . u . l . s . e, which could correspond to the four lights: the eclipse, the pyramids, the naked man's head, and the spotlights.

3. I remember an episode of Star Trek: The Next Generation in which Captain Picard was being tortured by the Cardassians. They had a method of torture which would involve showing the captor four lights, asking them how many lights there were, and when they answered four, they'd zap the captor with pain and tell them that it was three lights, even though they can see four. It was a test of character to see how long before they'd give in.

Any thoughts? I'm still into this whole Publius Enigma thing: something tells me there's some kind of meaning behind all this. Call me an obsessed fan reading too much into meaningless artwork, but I really think Publius was on to something.

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