<div class="wrap">
  <img src="https://oboi.ws/filters/vibrance_14_4789_1366x768.jpg" alt="">
  <div class="light"></div>
</div>

.wrap {
  position: relative;
  width: 45%;
  outline: 2px solid red;
}

img {
  display: inline-block;
  vertical-align: top;
  width: 100%;
}
.light {
  position: absolute;
  left: 22%;
  top: 46%;
  display: block;
  width: 3%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #ff0e;
  box-shadow: 0 0 10px 0 yellow;
}