How do you define efficient?

You seem to be talking about efficient visibility, saying that 35 15milliwatt dots are more visible than one scanning one, but you forget that for the cost of 35 15milliwatt lasers, you can buy one *much* much brighter laser, so you should really be comparing 35 15milliwatt lasers with one 500milliwatt laser (which is still $500 cheaper than 35 15milliwatt lasers, using real prices from wickedlasers), which is actually 33 times brighter than a 15milliwatt laser, which should be *much* more visible.

Think about the whole picture.
-Taylor

i’ll stop you there.

This unit can deface the front of a building far more efficient. Scrolling “Anarchy now” or “If you use microsoft you’re a weenie” on the 5th story of a high rise is far more visible with this unit than a scanning one.

I’d personally use 15mw Green lasers to make it insanely visible. What the point of tagging a building when most people cant even see it.

As well as that, spending 6$*35 on lasers is borderline insane considering you can get the same model from deal extreme for around two dollars and these (which are identically speced) for 0.98$ (10+) including shipping.
http://www.dealextreme.com/details.dx/sku.13378

Congrats on wasting your money on a wasteful design.

someone suggested that it might be possible to use a blue laser to get green by back illuminating some ZnS GITD material embedded in glass with infared and blue, resulting in “quenching” and green laser emission… in theory. then you’d have full colour with a single unit.