These things are downright NASTY
Completed shroud. Yeah, I'm a rebel. The standard protocol for shrouds is to shell out $50 for a chrome ring. I'm going for the stealth dark look, so I just used aluminum tape in addition to the metal flaps on the lens holder.
What the shroud does is prevent stray light from escaping around the edges. The cutoff does great shaping the light through the lens, but light can come out of the bowl at a weird angle and escape to the sides of the lens. It's dim compared to the light from the lens, but having a shroud noticeably reduces glare.
Here's what the bulb can 'see'
This is the longest range shot I can get inside. It's at an odd angle, a distance of 25-30 feet. Beautiful cutoff.
