Pleasant spaciness, long duration

2. T+06:00:00 [intensity]

intensity 

+ PLUS ONE — Clearly noticeable. You can tell when it began and how it's changing, though its full character isn't apparent yet.

3. T+12:00:00 [intensity]

intensity 

± PLUS/MINUS — Threshold — something may be present, but it's right at the edge of perception. A stronger experience would confirm it; otherwise it may be nothing.

4. T+00:00:00 [note]

The writer felt a mildly light-headed, disconnected spaciness that was genuinely enjoyable rather than troubling. A gradual decline began around the sixth hour, yet substantial effects remained six hours after that, marking this as a notably long-lasting material.