Mercury vapour lamp
Sodium vapour lamp
Halogen lamp
GLS lamp
2 to 10 atmospheres
3 to 10 atmospheres
4 to 10 atmospheres
5 to 10 atmospheres
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