Why.....

[fatboystew5]

do those energy efficient light bulbs take time to 'warm up' before giving out their maximum light? Some seem worse than others, the General Electric ones I bought in Tesco last week take about 30 - 45 seconds before they are fully bright!
:dunno:

 

[Duck n Dive]

'cos they are like flouresecent tubes and take some time for the gases to become excited!!

 

[derek kelly]

They tend to be like that when they are new give them a week or two & they will be to full brightness more or less straight away