AintFree 10 3 Jan 14, 2020 #61 G gnome said: They definitely had lights in 1998 https://www.bulbs.com/learning/history.aspx?mobile=true Click to expand... The HPS lamp was invented in the 50s and has been used indoors for cannabis since the 60's if not earlier by the government.
G gnome said: They definitely had lights in 1998 https://www.bulbs.com/learning/history.aspx?mobile=true Click to expand... The HPS lamp was invented in the 50s and has been used indoors for cannabis since the 60's if not earlier by the government.