A
Alex Coleman
- Jan 1, 1970
- 0
I am using four or five CFLs (a mixture of 11W, 15W and 20W) as room
lighting plus an 18W tubular rather than halogen. It may seem odd but
it is an ad-hoc arrangement to replace my too-warm 300W halogen
floodlight which I used to use!
http://www.aps.com/images/pdf/Lighting.pdf says that typical efficencies
are roughly:
CFLs = 20 to 55 lumens/watt
Tubular fluorescent = 60 to 100 lumens/watt
Is the 15 to 25 lumens/watt figure it gives for tungsten-halogen for low
voltage or mains voltage bulbs (which is 230v here in the UK)?
Does such a lumens/watt efficiency figure for low-voltage halogen
include typical power losses in the step-down transformer?
lighting plus an 18W tubular rather than halogen. It may seem odd but
it is an ad-hoc arrangement to replace my too-warm 300W halogen
floodlight which I used to use!
http://www.aps.com/images/pdf/Lighting.pdf says that typical efficencies
are roughly:
CFLs = 20 to 55 lumens/watt
Tubular fluorescent = 60 to 100 lumens/watt
Is the 15 to 25 lumens/watt figure it gives for tungsten-halogen for low
voltage or mains voltage bulbs (which is 230v here in the UK)?
Does such a lumens/watt efficiency figure for low-voltage halogen
include typical power losses in the step-down transformer?