I was just wondering if the GE Lucalox Ecolux lamps still have that green ring on the tip like some do. I know the Philips Alto Ceramalux lamps used to have the green dimple and later they had green in the base instead but I think now they are just a green etch.

Are all Lucalox lamps Ecolux and are all Philips lamps Alto now either? Seems they would all be to standardize production but it seems there are Philips Ceramalux in regular orange packaging with no mention of Alto at least.

I know Sylvania also had Eco lamps too.