To operate optimally as a business person, most adults need 7-9 hours of sleep per night. Here are the key points on sleep needs for optimal productivity:

• The National Sleep Foundation recommends 7-9 hours of sleep for young adults (18-25 years) and adults (26-64 years). Older adults (65+) need 7-8 hours.
• Getting less than 7 hours of sleep regularly can negatively impact mood, judgment, reaction time, productivity, creativity, and ability to learn and retain information.It increases the risk of mistakes, accidents, and health issues like heart disease, obesity, and depression.
• While a very small percentage (1-3%) of people may be able to function well on 6 hours or less due to a gene mutation, for most people regularly sleeping 6 hours or less leads to sleep deprivation and impaired performance over time.
• Prioritizing adequate sleep is essential for business success. Sufficient sleep allows the body and brain to recharge, consolidate memories, repair cells, and perform other restorative functions critical for peak cognitive and physical performance.

So in summary, while individual needs vary slightly, most business people require 7-9 hours of quality sleep per night to operate at their full mental and physical potential. Consistently getting less than this leads to compounding negative impacts on health, productivity and decision-making ability.