RE: Re: An end to high-energy bulbs

["Richard" <rich_lists@xxxxxxxxxx>]

Takes time for the pressure to increase in the tube to the point that
its
making enough usable UV for the phosphors, That's why the thinner tubes are
typically more efficient, because more of the UV it makes can be converted
(different wavelengths and all that)



The current is controlled by the ballast, so even though in theory the
lower
pressure will have less impedance, in practice it makes no difference since
the ballast has to control over a wide range to allow for the tube aging.







From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Paul Bendall
Sent: Saturday, September 29, 2007 6:14 AM
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: An end to high-energy bulbs



Ok but why does a CFL take 20 - 30 seconds to get to operating
colour? Does the current inrush and then decay whilst the bulb is
warming up or is it an inrush and the colouring is just part of the
ultimate wattage, whwereby some is used to warm the gases rather
than emit light?





[Non-text portions of this message have been removed]