christofoo
Yeah, bright paint color is very good, I understand your hesitation in painting the whole thing neon green. Reflectors are good at night when (if) you're being overtaken (more of a cycling issue), no good for any other circumstance. But forward lighting is key for the cross-traffic under right-of-way issue, which is a really critical and common scenario. Actually, the other supplementary solution I might be alone in suggesting is a chrome dome. Full daylight is the single condition where forward lighting tends to under-perform, in that scenario if all your top-half curved surfaces have a chrome finish then you become a source of glare.
I can see how a chrome finish would be great for visibility but that woul be even worse than neon green! 
I am a cyclist as well and commuted on bike all through high school, all year round. So, I am aware of the visibility issues. I had thought about having a flag lift up during low-speed driving but perhaps that would add too much drag.
Sorry, I don't know of any good threads I can direct you to for this purpose, and I'm not even totally happy with the available cyclist solutions (although I have some high power P7 LEDs in LiIon flashlights that I blind everyone with).
The thought I have put into this suggests the next place to look might be converting motorcycle luminaries to LED, but...
I'm not familiar with motorcycles period.
The end-game is getting tons of light sprayed indiscriminately across a wide azimuthal range, including the horizon and above during the day preferably in a flashing mode, then being able to direct it to the road so you can see where you're going at night without blinding oncoming traffic. Obviously automotive luminaries are really good at doing this but can't be converted to LED due to the specificity of the reflector design to the bulb type, and would be mechanically too big anyways.
Here's my other idea: Get a Magicshine, plus taillight. Turn signals would have to be a separate kit. You can try getting it without the battery pack and get a DC-DC converter so it can splice into your trike's battery, but that may just be extra work. Steal some road-pattern lenses from some cheaper lights so you can spread the pattern along the azimuth. Make a mechanical lever so you can toggle the hot spot height, up in everyone's eyes in the day, down on the road at night.
I intend for this car to cruise at speeds up to 65mph. I want it to be highway-worthy. Therefore, my main lighting has to be DOT approved and VERY bright. I have been considering mounting Hella 500 style driving lights inside the nose but they draw 55W each. I will probably end up with some sort of HID or halogen car headlights for the night and Audi-style LED strips for the day.
Good idea on directing the lights in people's eyes during the day, but how much oncoming traffic is really going to cause a problem? Only when I'm turning left across an intersection? I feel that maybe blinking LED running lights may be sufficient and I will just have to drive defensively. Having full-strength headlights on all the time would really drain the battery.
Speaking of which, does anyone know of a thread dealing with electricity consumption vs. CdA vs. battery size, or something of the sort? I'd like to have a rough estimate of how much space I'll need for batteries. Let's say I want it to go 100 miles on a charge, use a 26hp motor drawing on lithium ion batteries, and have a CdA of 1.5.