Performance Characteristics

This information was collected from Wal-Mart in September 2008:

brand	color temp.	actual power consumed	equivalent incandescent	light output (lumens)	comment
G.E. "Energy Smart"	6500K, "daylight"	10W	40W	490
G.E. "Energy Smart"	6500K, "daylight"	15W	60W	900
G.E. "Energy Smart"	6500K, "daylight"	20W	75W	1150
G.E. "Energy Smart"	6500K, "daylight"	26W	100W	1600
G.E. "Energy Smart"	"soft white"	10W	40W	580
G.E. "Energy Smart"	"soft white"	13W	60W	870	when burned base-up; output is 780 when burned base-down
G.E. "Energy Smart"	"soft white"	20W	75W	1250
G.E. "Energy Smart"	"soft white"	26W	100W	1650
G.E. "Energy Smart"	"soft white"	42W	150W	2700
Great Value	2700K, "soft white"	9W	40W	550
Great Value	2700K, "soft white"	13W	60W	900
Great Value	2700K, "soft white"	18W	75W	1225
Great Value	2700K, "soft white"	23W	100W	1600
Lights of America	2700K, "warm white"	14W	60W	900
Lights of America	2700K, "warm white"	20W	75W	1280
Lights of America	5300K, "bright white"	26W	100W	1700

Notes:

• Marketing terminology varies for different manufacturers. A 2700K lamp from Great Value is called "soft white", while Lights of America calls it "warm white". When comparing lamps, use the actual color temperature.
• Technical specifications vary for different manufacturers. G.E. "Energy Smart" has a "daylight" lamp with a color temperature of 6500K, but I recall some other vendor with a "daylight" lamp at 5500K.
• Lamp orientation makes a difference in light output. Only one package mentioned that the lamp is significantly brighter when operated with the base up. Many other lamps have output affected by orientation, but it is seldom mentioned.
• None of these lamps are marked as being compatible with dimmers.

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