The 270w stated is the maximum power of the light but the chips aren't run at the full 3w more like 2w (depending on colour). I have a MS0006 (same as the Highlite) and at 25c room temp it ran at 187w....the warmer the room the more power consumed but at an average g room temp it would run around the 190w DP state in the technical manual.
270W is not in question at all, 90x3W, but I believe the real power consumption will never hit 210W and if it hits 190W when hot that is perhaps because of fan control which takes 10w more power for them.
I have 360W lights and they take 180W with strong fans included, and one without fans takes 170W (126x3W=378W).