Run tunable white (HCL)

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Like this:

Code:

function tomins(hour, min)
  return hour * 60 + min
end

points = {
  { hour = 0, min = 0, v1 = 25, v2 = 50 },
  { hour = 7, min = 30, v1 = 25, v2 = 50 },
  { hour = 8, min = 0, v1 = 30, v2 = 30 },
  { hour = 9, min = 0, v1 = 50, v2 = 25 },
  { hour = 16, min = 0, v1 = 40, v2 = 15 },
  { hour = 17, min = 0, v1 = 30, v2 = 30 },
  { hour = 18, min = 30, v1 = 25, v2 = 50  },
  { hour = 24, min = 0, v1 = 25, v2 = 50 },
}

now = os.date('*t')
currmins = tomins(now.hour, now.min)

for i, point in ipairs(points) do
  nextmins = tomins(point.hour, point.min)

  if nextmins >= currmins then
    nextpoint = point
    prevpoint = points[ i - 1 ] or nextpoint
    prevmins = tomins(prevpoint.hour, prevpoint.min)
    break
  end
end

deltamins = nextmins - prevmins
if deltamins > 0 then
  d1 = (nextpoint.v1 - prevpoint.v1) * (currmins - prevmins) / deltamins
  d2 = (nextpoint.v2 - prevpoint.v2) * (currmins - prevmins) / deltamins
else
  d1 = 0
  d2 = 0
end

v1 = math.floor(prevpoint.v1 + d1)
v2 = math.floor(prevpoint.v2 + d2)

log(now.hour, now.min, v1, v2)