This is when you should stop working, office lighting is messing with your brain, and more trending stories

What’s happening in the world of work: The Saturday edition of the Daily Rundown highlights the business trends, perspectives, and hot topics you need to know to work smarter. Read on and join the conversation.

There’s proof: You can work too much. Your performance will improve as you dial up working hours from 30 to 50 per week. Go past 65 and you’ll likely encounter diminishing returns or even performance declines, according to UC Berkeley management professor Morten Hansen, who compared hours worked and performance of some 5,000 managers and employees. Hansen’s advice: Develop an optimal amount of hours for your particular role — your “Goldilocks” scenario — and stick to it. ? Share your thoughts: #LongHoursPayoff

Is your dim office making you dim? Low light could be harming your brain — particularly areas that affect learning and memory function, according to Michigan State researchers. They found that frequent exposure to dim light (which is plentiful in offices) changed the structure of rats’ brains, while bright light reversed the damage. The findings offer a warning to Americans, who spend an estimated 90% of their time indoors. Companies can design offices that increase exposure to natural light, and workers can do themselves a favor and take breaks outside. ? Share your thoughts: #LightBrainFunction

#YouAsked: “What age is too old to make a job change? Can GenX expect to make career advancements with boomers retiring?” —Stasia Lenhart, Executive Producer and Editor at NorthCoast Productions. ? Join the conversation: #YouAsked

• “The real question is: Can you afford to switch careers right now? Do you have significant savings that can carry you and all your expenses for at least a year? If you are not financially able to do this right now (and if this is something you really want to do), start saving for it right now. Little by little you will get there.” (Read more.) - Suze Orman
• “You’re never too old to make a job change — as long as you’re excited and passionate about the opportunity and willing to commit to do what’s required. This is the key — find something you love to do and do it with gusto and you’ll reap many rewards.” - Maynard Webb
• “Today, age is irrelevant to new career launches. Easier entry in today’s marketplace via startups, freelance, and volunteering mean that you have multiple avenues to test out fit, learn new skill sets, and build on what you know before making a full job change.” - Sanyin Siang

When you disagree with a decision at work, ask yourself one key question: Do you trust your organization’s judgment? If you do, do everything you can to make the plan succeed, writes Art Markman in Harvard Business Review. Carrying it out half-heartedly will only discourage your coworkers. Instead, try to understand your company’s motivations. Put yourself in their shoes, but don’t ignore your objections. Those will come in handy as you navigate the inevitable obstacles that arise in even the best of circumstances. ? Share your thoughts: #JobDisagreements

Judd Apatow’s recipe for ideal work relationships

For director, writer, and producer Judd Apatow, getting along with others is both essential to success and utterly straightforward. “Generally, I tell people, ‘Don’t be a dick.’ If people don’t want you in the room, it’s all over already. Don’t be that guy. Don’t be what we call a ‘room killer.’” ? Share your thoughts: #ApatowGettingAlong

One last idea: Many of us go to great lengths to avoid awkward situations. But journalist Melissa Dahl, author of “Cringe Worthy: A Theory of Awkwardness,” reminds us that moving through it is far better than sticking your head in the sand and hoping for the best. ? Share your thoughts: #AwkwardMoments

“Learning to become comfortable with ambiguity doesn't have to mean leaving awkward situations unaddressed; it often just means picking a path forward while acknowledging that it may be an imperfect path. It's simply the best choice you could make in the moment.”

What's your take? Join the conversations on today's stories in the comments.

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