Flash-cure units, regardless if they use panels or bulbs, should be considered an extension of the dryer. Specifically, at a given dryer temperature and speed, the exit temperature with a PFP on a 150/48 might be 280 degrees F when the shirt was laid on the belt at room temperature. If the same shirt and ink were pre-heated with a flash-cure unit, then the exit temperature will increase, to say 300 degrees F.
Of course, the print temperature should achieve the exit temp right before the garment exits the heating chamber. The bleed-resistant ink required in this context will have a minimum fusion temp of 275 degrees F and a maximum temp of 305 degrees F to restrain sublimation.
The specification might be 290 degrees F but the far more critical tolerance would be 275 degrees F to 305 degrees F.