On Jun 13, 1:51*pm, (D.M.
Procida) wrote:
D.M. Procida wrote:
So, the transformer is rated for 140W; what would likely happen with
only say 4 lights mounted on the cable tracks?

It's big heavy transformer - no sign of any electronics in there except
for a cut-off fuse.

The light fittings all take only 20W halogen bulbs.

So, I guess with four lights only it will eat up all the bulbs.

Daniele

A 140w 50Hz transformer might have a regulation of around 5 or 10%.
4x20w=80w, so the output voltage would have increased from max load
level to the same plus 2.5-5%. If the transformer is designed to be
say 1.5% undervoltage at peak load, the overvoltage would now be
1-3.5%.

life is proportional to voltage^13

efficacy is proportional to voltage^1.9

color temperature is proportional to voltage^0.42


So mean bulb life would shift from 1500hrs to 1320-960 hrs
efficacy would improve 1.9% - 6.7%
CCT would move up from 3000K to 3012K - 3043K


NT