QualSTAR QualSTAR from Lights of America: these ARE instant on, though it doesn't mention it on it's packaging. It DOES mention that it takes 30 seconds for full brightness - a tendency that I've noticed with most CFL bulbs. Model:2507 BGL Mfg: QualSTAR, Lights of America Store:Big!Lots Cost:$3.50 Color Temp: 2,700 Kelvin Equivelent: 40W Watts:7 Switch Test conclusion: Immediate illumination Movie Coming Soon...

TCP

My wife wanted a very bright light for the launry area. I went mailorder and bought this one. Despite the higher wattage, it's been excellent - providing VERY white light (5100 Degrees Kelvin), and turns on instantly. Model:28927M51K Mfg: Technical Consumer Products, Inc. (TCP) Store:Mailorder(web) Cost:$ Color Temp: 5,100 degrees Kelvin Equivelent: 100W Watts: 27 Switch Test conclusion: Immediate illumination