Just as with the MB, there are a couple of factors which you need to keep in mind when powering the NH through your car's DC.
1) Make sure the engine is running. The car battery alone sometimes will not provide adequate voltage to power the light. Turning the engine on will ensure this will not happen, as well as prevent your car's battery from draining. When charging the NH, however, it is OK to keep your engine off.
2) Never use an extension cable for your DC socket. I tried using an extension that was rated at 10A, but it still would not power up the NH. You must connect the NH directly to your car's DC socket.
To turn on the light, you must keep the power button depressed until the light comes on (about 3 sec). If you simply depress the button and let go, the light will not turn on. After the light is on, depress the power button once more for about 5 sec, you will change the light intensity from normal to low mode. Depress it for another 5 sec and you will go back to normal intensity. To turn the light off, simply depress the button and let go. Like the MB, the light is extremely quiet with little or no ballast sound.
The focusing mechanism is done by manual twisting of the head. Like the KumKang (KK), the NH has clear stops on both ends. The head unit turns with a nice silky smooth weight to it. I liked it. It reminded me of those really nice volume controls on very expensive audio equipment. Nice and heavy, but smooth. Xenonics said that the manual design was a deliberate one, as their light was designed to be used in rigorous operations where sensitive electronics could break. Low tech is sometimes best.
Run time is rated at 45 min for full power. Like the MB, I could not get anything even remotely close to this figure. As noted in other tests, I was constantly plagued by the battery life of the MB and NH. Possible explainations are mentioned in my review of the MB. At first, I thought I had made a mistake in charging the battery. But after it happened many times, I decided to always take the power cable with me. At least I only needed to carry ONE cable. :)
The beam angle at tightest focus has a tight penetrating center beam, but unlike the MB, it actually has a more uniform area of illumination, but not quite the pin-point focus (Fig. 3). In almost every area, the NH performed much like the "little brother" of the Megaray (MR).
The strange anomolies you see in the beam patterns is caused by the positive electrode inside the reflector.
Note that Fig. 3 was calibrated to show the secondary beams correctly, so the primary beam is overexposed. Light outputwise, the NH was comparable to the MB in normal mode, but the low mode of the NH was brighter than that of the MB. The MB in burst mode, however, clearly out classed the NH. But both fall short of the output of the MC or KK. For more beam shots, be sure to check out the comparisons page.