For Lowel RIFA owners...

[DanHD]

so a fluoro lamp would provide 4 times the output of a tungsten source?

How many types of lamps are there? i mean, commonly used today?

so far I know of,

tungsten, quartz, halogen, flouro, and hmi

 

[scorsesefan]

so a fluoro lamp would provide 4 times the output of a tungsten source?

How many types of lamps are there? i mean, commonly used today?

so far I know of,

tungsten, quartz, halogen, flouro, and hmi

Roughly four times, yes.

 

[PerroneFord]

How many types of lamps are there? i mean, commonly used today?

so far I know of,

tungsten, quartz, halogen, flouro, and hmi

Depends on how you define "commonly", but you could add metal halide and carbon arc to the list.