I typed up a lengthy reply to this, but must have closed without sending.
The purple and orange isn't working. The dark purples and blues on the NES are simply too saturated to pull of that kind of hue jump with lighting.
Moreover, by using such saturated colors, I feel that it doesn't adhere to the overall mood or style of the game.
Your original design looks like it'd be at home in 1991, maybe Shatterhand-era. The vibrant purple and orange looks more at home in, say '86, when more arbitrary colors would have been used, say in something like Layla. The technology was the same, but the aesthetics of the times were different.
I totally understand what you're trying to do with it. Small, localized, dim lighting. Warm lighting, cool shadows, etc. I know, because I've tried to pull of the same in my own work.
But, when it comes to showing an area in darkness, I'm a fan of simply dropping all of the values a notch. To illustrate, I took your "new, lit" image as a sample:
That way, instead of low, dim lighting. It's basically, none, or barely ambient lighting.