Did a quick check where other DRTs land peak white in Rec.709. These are very approximate, I just checked the values from the Nuke viewer.
| DRT | scene value |
|---|---|
| ARRI REVEAL | 230 |
| RED IPP2 | 190 |
| ARRI ALF2 | 57 |
| ARRI K1S1 | 41 |
| TCAMv2 | 40 |
| SONY S-Gamut3.Cine | 30 |
| ACES 1.3 | 17 |