Best I've found, and I do actually ride at night now and then. The new LED 'bulbs'.
They have problems, like not being 100% legal
but so do the HID kits. Unlike HID's they solve most of the problems without downsides, they throw enough light and are generally more pleasant than the stock lights.
High output standard incandescents run around 1000lm high or low.
LED's claim 2000lm low and ADD 2000lm high. They don't throw light as FAR as HIDs but I've found them nicer in practice.
Low is always on, so no momentary blackout when you flick between high and low, and on/off times are instant, zero delay.
Low being always on fixes the problem with going over a rise with high beam on and not being able to see the road in front, also fixes dirt roads, you can see down the road AND read the surface in front of the bike.
Final plus, light fill is really uniform, much better than incandescent or HID. They may not be as bright, but you can see clearly as far as you can see, with near zero glare. Road signs were painful with my aux lights on, so much scatter back that I kept loosing night vision and distance, the LED's just don't cause that problem .