Light source

What is a Betalight?

A Betalight is a sealed glass capsule internally coated with a phosphorescent powder and
filled with tritium gas to produce a continuous light throughout a service life of 15 years.

Our gaseous tritium light sources (GTLS) are absolutely reliable, completely maintenance free
and do not require an external power supply or ambient light for charging.

Betalight offers you total design flexibility. The lights can be produced in straight tubes, disk and spheres to suit all individual applications. Sizes vary from the smallest tube, with a diameter of 0,3 mm and 1,3 mm length, up to disks of 90.0 mm diameter and tubes up to 200.0 mm in length.

The Betalight / GTLS can be inserted in every product in almost every hazardous area where a lamp is required. The betalight emits a cold, clear light, there is no electricity needed, therefore, no fire or spark risk making it an ideal technology for various applications.



Do : Overall diameter         Ri : Inside radius                     Li : Lit length             Lo : Overall length         
Ho : Overall height              WD : Window diameter       P : Pip height            Wo : Overall width
Ø : Angle of arc


1. Dimensions

All dimensions are in mm refer to glasswork only. 
Paint should be allowed for separately and is normally
0.25 mm thick. 

2. Brightness

Betalight brightness is measured photopically in microlamberts.
(1 microlambert = 9.29 x 10&sup4; foot lamberts and 3.18 x 10³ 
candelas per square metre.

The brightness of a newly manufactured Betalight H3 depends on the thickness of the coating, the geometric shape, the purity of gas used, and the filling pressure from the source. Through the paint on a reflective layer of the light can be further intensified. One of the main points; the colour of the light. A green Betalight / GTLS with identical properties is always brighter than one colour in red or blue.

Green colour is normally recommended due to its efficient and visual brightness, Betalights can be produced in size, shape and any colour within the visible spectrum.

Details and illustrations represent the Betalight basic range only.
Betalights can be manufactured to suit individual requirements in
any colour in the spectrum and to virtually any size or shape.

Contact us with your lighting problems
Fill in below form or call 0031 341 36 0111




More information





Betalight b.v.
Hoge Eng West 28
3882 TR Putten (Netherlands)

Phone: 0031 341 36 0111

NAMSA registration code 4000049917
D.U.N.S. No.416901775

V.A.T. No. NL801345728B01
Chambre of Commerce: 08056517