Paul (W1VLF) has an identical PT54 Red Phlat LED with the lens, that Doug (AD0CX) gave me at the November NLRS Breakfast.

Paul has tested the PT54 LED and discovered that it can be collimated to a very narrow beam with the same fresnel lens that we are using for our K0THZ Optical Transceiver (2X Carson Page Magnifier) without using any other lens except the one that comes with the PT54 package.  See the photo below. That means the PT54 is a very good candidate for "Cloud Bounce" or "Water Tower Bounce" QSO's. The only caveat is that it draws 13.5 Amps at 2.6V and dissipates 35 Watts at full power. It Radiates 4.2 Watts at full power.

Rob -K0XL / K0THZ