Re: low energy lamps

Michael Hasemann (jmh@tko.vtt.fi)
Tue, 31 Jan 1995 08:47:09 +0200 (EET)

>
>
>
> Peter,
>
> > On a different note, I've built a terrarium fitted with those
> > low-energy fluorescent bulbs that are being marketed as replacements
> > for regular incandescent bulbs - ( 23W bulbs producing 1500 lumen, )
> >..
> > Anyone else ever tried these?

Yes, I am using them too. I grow Utrics under them and some VFTs.
They are doing well, e.g. what concerns growing. However, hardly any
of them (not even U.sandersonii) really likes to blossom under this
light. I just added a 40 W light bulb (some special Neodym something
/ made in Finland). I report if this triggers flowers.
I jsut forgot: P.emarginata and U.monanthos in contrast like this
light. P.emarginata is now continously blossoming since last year's
summer! (Thanks to Jan and his kind donation. It fills now a 15 cm
pot! It also (if I bother to pollinate) gives very fertile seeds. ANybody
interested ?)

I also noticed that there are different brands sold, e.g. coldwhite/
warmwhite. Earlier (or other brands) are not labelled with respect
of the type of light.

>
> I have a few of these at short distance above my plants.
> D.'s are developing nice red leaves as they would do under sunlight.
> Don't worry about heat radiation from the lamps, there's hardly any.
> (Think of a lamp working temperature of 40-60 centigrades.)
>
> Regards, Wim.
>
>
> ----- wim@djo.wtm.tudelft.nl -----
> (wim@morgana.gds.nl)
>
>
>

-- 
  Michael Hasemann | Technical Research Centre of Finland - Automation
		   | Kaitovayla 1, P.O. Box 13023, 90571 Oulu, Finland
                   | Fax: +358 81 5512320 Tel: +358 81 5512239 
  jmh@tko.vtt.fi <-email-------------www-> http://www.kau.vtt.fi/~jmh/