If you've driven through Greenwich and admired a perfectly lit tree, a softly glowing pathway, or a property that looks effortlessly elegant at night, chances are you're seeing the work of Mark Mosello. As the founder and creative force behind Design Lighting by Marks, he’s built a reputation for transforming spaces with light—without ever letting the light itself steal the show.
Mark’s journey into outdoor and landscape lighting started with a single, decisive act of creative confidence. On one of his earliest jobs in Scarsdale, Mark suggested illuminating a tree in the client’s yard. She declined. Not one to back down from an idea he believed in, Mark returned that weekend and made a simple offer: he’d light the tree for $300. If she and her husband liked it, great. If not, he’d dismantle it free of charge. They loved it—and word spread quickly. What began as one lit tree soon turned into a business built on trust, artistry, and word of mouth.
Today, Design Lighting by Marks is a full-scale operation offering landscape and indoor lighting, a five-star-rated generator division as a certified Generac dealer, and comprehensive turnkey services—from permits and buried propane tanks to concrete work and 24/7 emergency service. Their “Time to Give Back” initiative has raised more than $1,000,000 for local charities—a testament to Mark’s commitment to community as much as craftsmanship.
Mark’s design philosophy is refreshingly understated: "Light should not be noticeable. Glare ruins everything," he says. “It should look peaceful, natural, and enhance reality—not distract from it.” That principle has guided his team to become known not just for installing lights, but for illuminating homes with elegance and intention.
The process begins with a walk-through. “It takes me five seconds,” Mark says of his ability to visualize the transformation. He tailors each design to the property and the client's needs, ensuring it’s both energy-efficient and aesthetically beautiful. From soft washes of light over trees to subtle glows along architectural lines, each installation is seamlessly integrated using dark, earthy-toned fixtures that blend in, not stand out.
Key to Mark’s approach is a balance of function and beauty. The result is often so serene, it feels like the light is coming from nature itself. “There’s a lot of missed opportunity in your indoor and outdoor spaces without designer lighting,” he says. “We make it look elegant, not noticeable.”
It’s a craft honed over years and a client list that includes high-profile names like Jamie Dimon, Sandy Weill, and Diana Ross—who famously gave Mark’s team signed autographs as a thank-you.
What excites Mark most these days? The continued advancement of LED technology, allowing for dramatic effect with minimal energy use. "You can leave your lighting on all night long now," he says, “and it costs pennies.”
When asked what advice he has for homeowners considering lighting upgrades, he keeps it simple: avoid glare, work within your budget, and always aim for lighting that looks like it belongs there naturally.
"What I enjoy most," Mark adds, "is making people feel happy. I get a nice buzz from everyone’s reaction."
When he’s not transforming properties, you’ll find him relaxing with family, enjoying breakfast in bed, or dining out with his wife—proof that even the man who lights up everyone else's life knows how to enjoy the quiet moments.
The Full Spectrum
Design Lighting by Marks offers more than just beautiful light. With a five-star generator division, complete permitting and installation services, and 24/7 emergency support, they’re your go-to team for reliable, elegant, full-service solutions indoors and out.