energy savings

longer life time

short life

energy saving and longer life

bluish light

reddish light

pinkish light

greenish light

1800 degree C

2000 degree C

2100 degree C

2200 degree C

1

2

3

4

using two 20 watts lamps with 40 watt choke in series

connecting the twin-tube lights in parallel as lag-lead circuit

connecting higher value range of capacitor

using thermal type of starter