This is a vintage Fairy Lamp in the Hobnail pattern. The color is Topaz or Vaseline Opalescence and it reacts to UV light and glows bright neon green due to the uranium used as a colorant.
The lamp is illustrated in Yellow Green Vaseline by Glickman & Fedosky on page 64. It may be attributed to Fenton.
Condition is very good with no cracks or repairs.
Many thanks and please see my other vintage glassware and vaseline glass up for auction.