Look, the 15m spaced lights are the ground facilities required. The RVRs are minimum visual ranges required. Two different requirements but they are not mutually exclusive. You need
both.
Because my ground speed won't be in excess of 60 kts during the acceleration on that section of the runway.
Really? How can you tell? What about something like a Q400 which will be dong well over 80kts, at lightweights, within 300m. They aren't allowed to do low vis take offs?