CFLs generally get hot, and need to be formulated to be most efficient when they have stabilized in temperature. They are sensitive to temperature, by being dependent on mercury vapor producing 254 nm UV. Too cold, and there is not enough mercury vapor. Too hot, and the mercury vapor absorbs 254 nm UV.
Many CFLs have the mercury formulated into an amalgam so as to achieve optimum concentration of mercury vapor when the CFL has warmed up.
CFLs with outer bulbs have their tubing getting even hotter - so there is even more need for warmup. On the other hand, those actually do well over a wider temperature range once they warm up - and include most advised for outdoor use.
If you want CFLs that start brighter and have less need to warm up, go for ones with bare tubing rather than outer bulbs, and try for ones with larger tubing and larger overall size for their wattage. Ones with 15 mm tubing often start at half or a little over half of full brightness.
Ones with bare tubing warm up faster than ones with outer bulbs. If the design is for greater compactness and need for more warmup, then at least that will occur faster.
So, tell us from Australia where in England does one walk in off the street and find these to be the usual CFLs there. How about available at all in a retail store for that matter?
Here in USA, I have yet to see a spiral CFL having any reference other than yours as "Tornado", and I have yet to have a CFL with bare tubing fail to be a majority of the way warmed up in 1 minute from 18 C or above.
Exceptionally extreme dim-starting (according to figures I consider unverified) and slow-warming (what percentage after 2 minutes? 90%? 99%) spiral that I have yet to see anywhere except your citation.
I have Philips spirals that are mostly warmed up in less than a minute and at 1 second after power is applied they are a #@(# of a lot brighter than 10% of full even at 18 degree C ambient!
What I "have seen" being *notably absent* in *usual situations* with
*common products* is atually information.
Also, I have found and posted as such that taking half a minute to a minute to get to more than halfway to full brightness is often not so bad - I usually find that outright welcome in bathrooms!
Also, colder than 18 C is exception more than rule for rooms.
Furthermore, how the bleep often is light output of 20-25% of full "dangerous and also lacking escape from danger by waiting for half a minute to 45 seconds?
** This complete loon must be one of the biggest JERKOFFs on usenet !!
** Yaaawnnn - more meaningless drivel.
** While most others find it damn annoying.
** It is very common in bathrooms, in winter, in many places for the temp to fall to near 0C overnight.
What a utterly stupid ass you are.
** What YOU are too damn stupid to realise is YOUR problem.
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