;
.
ï
.
!
Eâhürîg,…
‘, »
85
“
consider the“ equipment requiredto produce ="&Ÿticialg
the techniques which enable it to be used efciently. Only
_
electrical sources produce light of sufcient
for aquatic .uSe:
_
Domestic types
of appliance Such as
or u—
orescent tubes,
usuallyused, often with mincir modications
'
_
tosuit them for u5ein aquaria…
’
'
_
.
‘
_
_
_
(end section)
—'
_
Domestic lampholder witti protective skirt
—
.
(b)
.
—
____
__
__
_
_
__
Hood(viewed from underside)
_
.
_
Reai_ng
……
_.
..
_
,
_
_
'.
_
_/ Fluoresecent tube \
..
‘
,
-
.Grommets
'
/
_
—‘.
.
.
,
…
__Cablesto tut;e.ends
.
._
_
_.
_
Fig.
Typical light fittings for. the
_
_
»
_
_
(l)) Fluores'centtube
-
-_ »
‘
__
__
sib,Ï
Tungsten
' … 3221) '_as used “in
several
“Serious .di‘sàdvantagés if improperly used 'f0r lighting… Becausethey
to buy and easy‘fto __—ins_tall theyareoftenused
With.]little thought,— resulting
a short life»for the lamps, 1nefc1ent
‘
us,exof their light and ”potentially dangerous sûuatmnsBulbsmad@
_
:îzff0r»_dômèStiC use ‘farç often designed
“that “the 1}‘_1àment ISOIV
-
supported « :internay when the.“ bu1b is hangmgverücav
‘
_‘ andtheÿ être not;
me ant
be
wh€SW1tChedon
Thusthe1r installation,
in shallow hoods(unfounaæly
gamaccessf®rfeedmgand cleanmg canresultmaconselablelate
freplaœmentAlwtheusualtype of domest1clamphïderwhmh