Good morning, Sharon,

Thank you for contacting Mearto with your appraisal inquiry.
These lamps are really popular, though values obviously vary if these are stamped by a (desirable) maker. If you can find a stamp for Tiffany Studios, Quezal or Handel (some of the lamp makers who made this model) I would be happy to reconsider my valuation.
I've listed few auction sales of unattributed but comparable lamps here so you can get a sense of where the market currently is for this type of lamp:
($2,000) https://www.invaluable.com/auction-lot/bronze-and-lily-light-table-lamp-with-zephyr-shad-1b9470692b
($300) https://www.invaluable.com/auction-lot/twelve-light-contemporary-bronze-lily-pad-table-l-a2444c6935
($150) https://www.invaluable.com/auction-lot/bronze-tiffany-style-lily-lamp-8114b97b79
($0) https://www.invaluable.com/auction-lot/heavy-metal-and-art-glass-lily-lamp-ea34a138e2

Based on the photographs and information provided, and subject to examination, you have:
A Tiffany style bronze 10-light lily table lamp
American or European, 20th Century
apparently unmarked
approximately 18 inches tall
PROVENANCE: acquired in an estate sale
$250-350 (represents a fair market value for auction purposes; retail or asking price may vary).

Please let us know if you have additional items to appraise, and thank you for using Mearto.