Sulfur Lamp
The efficiency claims of these are very nice:<p>Sulfur Lamp: 100 lumens per watt. [0]<p>Random LED Light bulb: 88.888 lumens per watt. [1]<p>~20% improvement.<p>[0] <a href="https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20030818061414&#x2F;http:&#x2F;&#x2F;195.178.164.205&#x2F;IAEEL&#x2F;iaeel&#x2F;newsl&#x2F;1996&#x2F;ett1996&#x2F;LiTech_b_1_96.html" rel="nofollow">https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20030818061414&#x2F;http:&#x2F;&#x2F;195.178.16...</a><p>[1] <a href="https:&#x2F;&#x2F;www.amazon.com&#x2F;TCP-Equivalent-Light-Bulbs-Non-Dimmable&#x2F;dp&#x2F;B01BFCGBN6&#x2F;ref=sxin_3_osp20-e7752483_cov?ascsubtag=e7752483-0229-43a1-a742-1cf152cf90a2&amp;creativeASIN=B01BFCGBN6&amp;crid=2S67XR1BNZ6UY&amp;cv_ct_id=amzn1.osp.e7752483-0229-43a1-a742-1cf152cf90a2&amp;cv_ct_pg=search&amp;cv_ct_wn=osp-search&amp;keywords=led+light+bulbs&amp;linkCode=oas&amp;pd_rd_i=B01BFCGBN6&amp;pd_rd_r=28522f1d-5a89-4c3b-90d4-56ec96c80199&amp;pd_rd_w=D1mJO&amp;pd_rd_wg=McWsM&amp;pf_rd_p=53eff971-6e12-4016-9864-b6dfd929b2b3&amp;pf_rd_r=6YM89H606R25JTM75EAH&amp;qid=1575211510&amp;sprefix=led+light,aps,139&amp;tag=bestcont06-20&amp;th=1" rel="nofollow">https:&#x2F;&#x2F;www.amazon.com&#x2F;TCP-Equivalent-Light-Bulbs-Non-Dimmab...</a>