SMD = Surface Mount Device
Mark it looks like you deal in some considerable volumes of LEDs here. Is there a preferred store that you are buying these from? The Richmond Controls sight looks pretty archaic and difficult to order from.
I have done plenty of different types of ditchlights using surface mount LEDs.
Here are some examples.
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Mark that traffic cone looks great. And thanks for the link to the seller. I think you lucked out with the round 0603's, it seems like the norm are the square ones.
Here is all the info on the round ones. If interested then I have been selling them at $0.10 each.
EMail me at mgwsy@aol.com and we can discuss a price.