Non-Linear Fluorescent

Updated
23-VII-2016
While the long, slender proportions of the original Linear Fluorescent lamps makes them ideal for many applications, it can be a hindrance in others. A decade after the commercialisation of fluorescent technology and the refinement of the basic range, efforts were diverted into reducing the size of the light source. At first this was achieved by folding the standard tubes into various planar geometries - such as the circular, U-tube and W-shaped patterns featured on this page. Later still, improvements in phosphor technology permitted a considerable reduction in the diameter of the discharge tube, and that spurred the development of the third category of this lamp technology - the Compact Fluorescent lamps.

O-Shape

GE

40W

FC16T10CW T10 with Rapid Start cathodes
1956

Philips

40W

TL-EM T9 with stripe for Tungsten Ballast
1956

Sylvania

32W

FC12T10WW T10 with Rapid Start cathodes
1970

Toshiba

30W

FCL30ELC-28PDLN with Side Reflector
2015

National

40W

FHD40EL Twin-Tube Circline
2012

Philips

32W

Coloured Circline Lamp, TLE 32W Yellow
c. 1960

Philips

32W

Coloured Circline Lamp, TLE 32W Pink
c. 1960
       

U-Shape

Osram

16W

HNW72 T8 U-Shape fluorescent
1950

Osram

65W

L65W-25U T12 U-Shape fluorescent
1965

Philips

20W

TL-U T12 U-shape fluorescent
1971

Thorn

40W

T8 U-shape fluorescent for metric ceilings
1981

Sylvania

34W

FB34/941/6/SS/ECO USA energy-saving lamp
2012
   

W-Shape

Philips

25W

TL-W T8 W-shaped fluorescent
1967

GE

50/80W

Panel 'F' Square moulded fluorescent
1965