Development of a bright light therapy apparatus

Development of a bright light therapy apparatus - Development of a bright light therapy apparatus

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000025694

Enrollment

Registered

2017-01-24

Start date

2017-01-24

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Sleepiness

Interventions

No light, or 10000-lux light of which the blue light content was reduced by 50% or 30%, is administered from 0500 to 0530 for four consecutive days each, with four-day intermission.

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: healthy men

Exclusion criteria

Exclusion criteria: subjects who are treated for any illnesses

Design outcomes

Primary

Measure	Time frame
calculation task score immediately after light therapy	—

Secondary

Measure	Time frame
subjective sleepiness on rising subjective sleep quality sublingual temperature sleep quality total sleep time	—

Countries

Japan

Contacts

Public ContactJun Miura

Hokkaido Pharmaceutical University Pharmacotherapy

miura-j@hokuyakudai.ac.jp011-676-8700

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026