So the effects animators did a better job of syncing up the beam in the "King" shot, the effects animation was all over the place throughout the show. Any number of things can affect how bright the light bulb is, or what's visible in that tiny sight window. The window in the "King" shots appears to have smudges on it, the props were often dusted to kill reflections. There are other episodes where nothing is seen in the window. And yes angle plays a part, the P1 sight frame is about 3/8 inch back from the P2 window. The best "King" shots are from the lower left view.The image on the right is what I saw - the emitter tip is not very bright (compared to other Hero P2s firing - such as the Finney P2 in Galileo 7 and I could not freeze a frame - where the emitter was lit first - as I can with every other Hero P2 firing.
Also the animated beam appears to start inside the nozzle...
This scene is relatively dark - compared to the scenes where Guytano and Latimer fire the Finney P2 where the emitter tip is much brighter.
OK so if the emitter on the Riley/Lenore P2 is a short concentric, cylinder (it looks conical to me) as was the case on the Kirk P2 / "Unknown" P2 - which would make it the 4th B&W Hero P2 to be filmed in episode 6, "The Man Trap" - then perhaps the battery in the power pack grip was dead and the P1 is not a Hero. Because I should be able to see the P1 sight window in the Riley P2 - where light and angle cannot be argued - and I do not.