The news headlines about what perks or elements of office design make for a great employee experience seem to be dominated by fads — think treadmill desks, nap pods, and “bring your dog to work day” for starters. But in a recent poll of 1,614 North American employees, access to natural light and views of the outdoors was the number one attribute of the workplace environment outranking stalwarts like onsite cafeterias, fitness centers, and premium perks including on-site childcare. There are wellness and productivity implications, too: academic research has found that workers with natural daylight in their office environments reported a 51% drop in the incidence of eyestrain, a 63% drop in the incidence of headaches and a 56% reduction in drowsiness.

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The news headlines about what perks or elements of office design make for a great employee experience seem to be dominated by fads — think treadmill desks, nap pods, and “bring your dog to work day” for starters.

However, a new survey by my HR advisory firm Future Workplace called “The Employee Experience” reveals the reality is that employees crave something far more fundamental and essential to human needs. In a research poll of 1,614 North American employees, we found that access to natural light and views of the outdoors are the number one attribute of the workplace environment, outranking stalwarts like onsite cafeterias, fitness centers, and premium perks including on-site childcare (only 4-8% of FORTUNE 100 companies offer on-site child care).

The study also found that the absence of natural light and outdoor views hurts the employee experience. Over a third of employees feel that they don’t get enough natural light in their workspace. 47% of employees admit they feel tired or very tired from the absence of natural light or a window at their office, and 43% report feeling gloomy because of the lack of light.

These findings support a larger trend of the growing importance of employee wellbeing. According to Gallup’s most recent iteration of the State of the American Workplace, more than half of employees report better overall well-being as “very important” to them. In the same survey, work-life balance and overall well-being were determined to be the second most important factor when choosing to work for an organization. When employees are fulfilled in all aspects of their well-being, this leads to increased employee engagement and increases individual performance.

The desire for workplaces infused with daylight and views may also be due to our increased usage of mobile devices. The eMarketer Mobile Research study reports that American adults over the age of 18 spend about four hours on their mobile devices every day. In “The Employee Experience” study, we found that 73% of employees surveyed agree that the longer they use their technology devices, the more they desire a visual break such as taking a walk or looking through unobstructed windows to an outside view.

Research by Cornell University Professor Dr. Alan Hedge reinforces the connection of natural light and employee wellbeing. Dr. Hedge’s recent research study found optimization of natural light in an office significantly improves health and wellness among workers. In fact, this research revealed that workers in daylight office environments reported a 51% drop in the incidence of eyestrain, a 63% drop in the incidence of headaches and a 56% reduction in drowsiness.

The fundamental health benefits of access to natural light are causing some firms to re-imagine their workspace and tout this as a recruiting tool. A great example of this is The Spheres, an Amazon workspace in downtown Seattle that’s also a curated jungle with over 40,000 plants. Amazon’s Spheres relies on the premise that natural light, plant life, and healthy activities such as walking reduce employee stress and improve job satisfaction more so than a standard office building. (Note that in contrast to many of its peers, Amazon has chosen to invest in Spheres rather than other commonly touted office perks such as free lunches and snacks.)

Too often, organizations design workspaces for executives with large windows while lower level employees do not have access to light. But it doesn’t have to be this way. Airbnb has pushed the limits of designing its customer call center operation in Portland, Oregon. Rather than windowless work stations commonly found in call centers, the Airbnb Call Center is designed to be an open space with access to natural light and views of the surroundings while replacing desks and phones with long couches, standing desks and wireless technology. The benefits of these elements is is well recognized. In fact, some European Union countries mandate employee proximity to windows as part of their national building code! This is because they realize that an absence of natural light hurts overall employee experience, up and down the organization.

Natural light isn’t the only important aspect of workplace wellness, of course. For example, one frequently cited Harvard study showed that improving air quality caused mental cognition to soar. But the Future Workplace Employee Experience Study found 78% of employees say access to natural light and views improves their wellbeing and 70% report improved work performance.

The notion that the creation of the workplace environment is solely a real estate concern is an outdated concept. Today, employers recognize that the workplace environment is now part of the overall employee experience equation and a key lever to attract, engage, and retain top talent.

In fact, CEOs are starting to focus on how the workspace can lead to improved productivity. Overstock’s 230,000-square-foot office in Salt Lake City, UT features a panoramic view of scenic Salt Lake Valley. Rather than obstruct this view with blinds, Overstock CEO Patrick Byrne wanted a solution that kept his employees connected with the view while working. So, Overstock installed 30,000 square feet of smart windows which automatically adjust to optimize natural daylight, allowing workers to shield glare from computer screens and creating a more creative work environment. With an annual payroll of over $100 million, even a 2% increase in productivity translates to a savings of $2 million.

Now think about your organization. Workers spend on average 5 hours and 42 minutes at their desk each day. Having access to natural light can have a bottom-line impact on your employees’ work performance, wellbeing and engagement.

How can you think differently about the impact of natural light in your organization? Here are three suggestions:

See the workspace through the lens of your employees. Today, business leaders are aware of the power of creating an employee experience to mirror their company’s best customer experience. Tools such as design thinking and employee journey mapping are now often used to understand the moments that matter to employees. In fact, many companies are creating a new job role, Head of Employee Experience, to work closely with heads of Real Estate and IT to design and monitor how the employee experience is woven into the fabric of the business.

Listen to your employees to understand what type of workplace environment they want. Companies routinely conduct employee surveys to gather feedback on a number of factors such as their culture, performance management and investment in learning and development. Now, they also need to include survey questions on the expectations employees have for the type of workspace they work in and how this impacts their overall wellbeing.

Consider creating an optimal workspace for all employees — both executives and front-line workers. The notion that organizations create optimal workspaces for executives only is no longer the case. Companies like Airbnb and Overstock recognize the importance of the workspace for all employees — from the executive team members to the front-line customer call center operators. As employee experience becomes increasingly important to attract, engage and retain top talent, the workspace is now recognized as an integral part of this experience.

As companies increasingly look to empower their employees to work better and be healthier, it is clear that placing them in office spaces with the optimal amount of natural light should be one of their first considerations.