On 11/12/2019 22:46, Clifford Heath wrote:
On 12/12/19 9:40 am, wrote:
Â* I just ordered a couple of outdoor flood lights fromÂ* Aliexpress.Â*
They are 50w led lights and are suppose to put out 4500 lumens.Â* I
plan on using them instead of a 500w halogen light.Â* A 500 w halogen
light puts out about twice as many lumens, butÂ* the eye sensitivity
is a log function so the led lights will seem almost as bright.

The lamps I ordered are intended for non portable installations so I
will have to put on a electric cord.Â* And they are not super
efficacy.Â* They are 50 watt lamps and put out 4500 lumens so do not
break any records for lumens per watt.Â* But do win on cost .Â* About $
3.60 each delivered.

That seems like a very low price. These things need a *substantial*
heatsink and/or forced air - the LED alone will die almost instantly.

We have a fixed 50W LED flood for the back yard, and it's incredible
for that porpoise.

I wouldn't want one in the garage (8' ceiling) because it's just too
much light from one very small region. You get dazzled by reflections
from everywhere and can't see anything in the deep shadows.

I think shop lighting needs to come from many angles - like multiple
long flouro tubes or the LED equivalent. If you have a very high
ceiling (15' or more) it would be different, but then you probably
still need at least four separate fittings.

Clifford Heath

Painting the walls white helps a lot also. It made an amazing difference
to the light in a mates garage with the same lights the white paint made
the whole area more usable and illuminated. In my garage it had been
wired with double lamp ballasts but only one light was connected to each
ballast but the extra fluorescents were already in place as all came out
of the local gas board office when they renovated. Connecting all the
extra lamps made the difference as you could then walk into the garage
from a sunny day outside and not have to wait for your eyes to adjust to
the lower light level.