I was using for the first time (I think) "neutral white" led light in yesterday's night o. Similar to this one. I think is in brackets since I bought the light quite some time ago already (thanks Jagge for recommendation) and have run some tests only and my daughters have used it too. Based on the run yesterday I would say that "neutral white" is a bit better than widely used "cool white".
Running warm up/down 11:43  1.76 km (6:39 / km) +34m6:04 / km shoes: Inov-8 280 Oroc (2016)
Orienteering55:46  **** 7.14 km (7:49 / km) +155m7:03 / km spiked:11/12c shoes: Inov-8 280 Oroc (2016)
Yökuppi in Sairakkala. Except seven it was a very good run. Seven minutes on lucky seven. I must have been very close, but didn't see and lost trust and decided to relocate from the path. I've been first at six. Wohoo. Guys made big mistakes on that, but still some sort of record for me to be first at least thinking the previous years.