Back when Hector was a pup, corrugated sleeves for packaging General Electricâ€™s â€ślong lifeâ€ť incandescent lamps had a notice that generally recommended use only for cases where
1) labor cost for replacement was very high, or,
2) electricity cost/kWh was very low.
Their apparent rationale for the notice: energy efficiency of these specific lamps was poor, so discouraged for general use.
Aside â€” This type of lamp was manufactured with brass-screwshell bases and not aluminum, so were desirable for cases where the lampholder screwshell was also aluminum, potentially making the lamps difficult to later replace if condensation occurred.
[This message has been edited by Bjarney (edited 06-24-2004).]