* {
  border: 0;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial;
  /*min-height: 100vh;*/
  background: white;
  color: #fff;
}

.container-lamp {
  width: 650px;
  margin: 0 auto 45px;
  padding: 0 25px;
}
.container-lamp .lamp {
  position: relative;
  width: 100px;
  height: 0px;
  border-bottom: 40px solid #2b7777;
  border-left: 25px solid transparent;
  border-right: 25px solid transparent;
  margin: 70px auto 0px;
}
.container-lamp .lamp:before {
  position: absolute;
  top: -120px;
  left: calc(50% - 4px);
  width: 8px;
  height: 120px;
  content: '';
  background: #2b7777;
}
.container-lamp .lamp .lamp__light {
  position: absolute;
  top: 40px;
  left: calc(50% - 225px);
  width: 450px;
  height: 0px;
  border-bottom: 430px solid #83bcb6;
  border-left: 175px solid transparent;
  border-right: 175px solid transparent;
}
.container-lamp .lamp .lamp__light:before {
  display: block;
  width: 60px;
  height: 30px;
  content: '';
  margin: 0 auto;
  background: #dbe0ef;
  border-radius: 0 0 60px 60px;
}