Reflect Orbital wants to hang mirrors in the sky and sell the sunlight they bounce back to Earth. The startup’s plan, laid out in coverage led by Popular Mechanics, calls for 50,000 mirror-carrying satellites that would reflect sunlight onto the ground after dark, built out through 2035. The scale is unmatched by anything flying today — no mirror fleet of that size exists — and the numbers behind the pitch deserve a close look.
Start with the hardware. The demonstration craft would unfold a film reflector on the order of 59 feet — 18 meters — across, aim a patch of light some 3 miles in width at chosen ground, and cover a reported area of about 24 square kilometers. The company frames the product not as a satellite but as a service: “clean, plentiful energy on demand”, delivered as “noon light to moon light” when and where a customer asks.
A single mirror, however, cannot hold a site lit. From orbit a spacecraft still sees the Sun after the ground below has gone dark, and a large, flat, steerable film mirror can send that light down — but the lit patch slides across the sky as the craft passes, and a low-orbit crossing takes only minutes. Sustained lighting means passing the beam from craft to craft, each holding its aim on the way up and on the way down. That is why the design talks about tens of thousands of spacecraft rather than a few dozen, and why the hardest problem is holding a 59-foot film mirror at a steady angle at several kilometers per second, where even a small error walks the beam far off its target.
How bright would the result be? Coverage has ranged the light from moonlight-level up to the brightness of noon sunlight. Working from the reported mirror and beam sizes, one published estimate assumes a perfectly flat mirror, the Sun’s apparent width of about 0.53 degrees, noon at roughly 100,000 lux and a full Moon at about 0.25 lux. Its arithmetic: an implied altitude near 522 km for a 3-mile beam, a circular footprint of about 18.3 square kilometers, a mirror area of roughly 254 square meters, and one mirror delivering about 1.4 lux — on the order of 5.6 times a full Moon. True noon brightness over one patch would take about 72,000 overlapping mirrors, which makes the noon end of the range a ceiling for stacked beams rather than a default. The 24-square-kilometer coverage figure also runs larger than the 18.3-square-kilometer circle; an elongated footprint, a different definition of lit area, or plain rounding could explain the gap.
The uses follow from that brightness. Nighttime search-and-rescue and emergency response lead the list; the commercial centerpiece is stretching solar-farm output past sunset, with farming and after-dark construction rounding out the pitch. Public-safety agencies, which need visibility rather than electrical output, look like the natural first customers — a spot of light a few times the Moon’s brightness, available on demand across a 3-mile patch, is enough to work by.
Two figures should be treated with caution: a price of $5,000 per hour and a raised total of $28 million circulate without any official price list or investor record behind them.
The ambitions come straight from the top. In a 2025 interview he put the problem down to habit: “We’re here because, for some reason, people just accept the Sun goes down at night.” The business logic, in his words: “We can basically sell the sunlight like it’s a resource.” Whether sunlight can in fact be sold depends first on pointing accuracy — the number that will decide whether 50,000 mirrors ever leave the drawing board.
Sources
- FCC approves first orbital reflector satellite launch
- Reflect Orbital: 50,000 Space Mirrors Plan [2026]
