Settle down Francis!!!!!
To begin,I'm in totalagreement with you WRT part 135 opspecs. Now lets assume this was a part 91 flight for the sake of argument. While I agree that there may have been better/other choices the crew could have made, niether of us were there and there are other considerations as well.
But first a little constructive criticism, a DA-900B is about half as costly as you state (about $25 mil), if ref was 150 kts he's got bigger probs than no runway lights (typical ref speeds are around 120 give or take), would another runway choice exceeded his max tailwind component or max demonstrated crosswind, and if the engines (theres 3 of 'em) were at flight idle, he would be at 30' AGL or less and runway lights aint gonna help you from hitting something at that point.
Now I'm not saying that "sure, we do it all the time" is the prudent way to conduct business but it is in no way automatically considered "careless and reckless". In fact if it was conducted as a properly briefed approach it was probably a great training opportunity for when the lights inadvertently go out on short final at some uncontrolled field.
Lastly, I don't know you and you might be a great guy/pilot but please don't admonish others without knowing all the facts and quit practicing for your FSDO interview by applying your arbitrary view that just because you wouldn't do it, it must be careless and reckless.