Light source	Tasks
Strobe	Sustain /i/ at comfortable pitch/loudness
	Soft /i/
	Loud /i/
	High pitch /i/
	Low pitch /i/
	Loudness glides (soft→loud→soft)
	Vocal diadochokinesis (DDK) maneuvers: /ihi ihi ihi ihi/, /isi isi isi isi/, /i/-sniff-/i/-sniff-/i/-sniff
	Sing happy birthday
	Sing warmups with melisma (i.e., do-mi-re-fa-mi-so etc, all on /i/)
	Pitch glides (low→high and high→low) x 2
Halogen	Loudness glides (soft→loud→soft)
	Vocal diadochokinesis (DDK) maneuvers: /ihi ihi ihi ihi/, /isi isi isi isi/, /i/-sniff-/i/-sniff-/i/-sniff
	Sing happy birthday
	Sing warmups with melisma (i.e., do-mi-re-fa-mi-so etc, all on /i/)
	Pitch glides (low→high and high→low) x 2