Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Get premium

Create a timeline

Public timelines

About & Feedback Terms Privacy FAQ

Cabinet Get premium

Donate

jan 1, 1970 - Ed Hammer made CFLs with mercury vapor, argon, and a flurescent coating called phosphor

Added to timeline:

Light bulb Timeline

2 Oct 2018

0

0

424

Date:

jan 1, 1970

Now

~ 55 years ago

About & Feedback Terms Privacy FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL