Metal Halide v LED High bay lights

[Blobber]

Be interesting to stick a light meter under them just to see what the real world difference is between the 2

 

[daleyd]

I would imagine a decent energy saving could be had if you fit sensors to them - a lot of Metal halide lights are just left on due to the warm up time.

 

[brightspark]

Be interesting to stick a light meter under them just to see what the real world difference is between the 2

the lead lights are bright underneath but havent the spread the same as metal halide or sodium

 

[Fraserb]

Be interesting to stick a light meter under them just to see what the real world difference is between the 2

It was interesting when we did the big shed, there was a mistake somewhere in the design stage and most of the lights were installed at the wrong spacing, shed still looked really bright but walking down the passage way with a lux meter showed it dropping off quite a lot when you were mid point between the 2 lights, they altered all the lights to the correct spacing and to the naked eye there seems no difference but walking about with the lux metre shows a far more even reading, you do get ahigh reading directly below them but not the big drop off like before.

 

[Blobber]

I was thinking more to compare the metal halide to the LED, the LED stuff always seems to be way down on lumens compared to traditional lighting, its the colour of most LED lamps that fools the brain into thinking they are brighter

 

[brightspark]

It was interesting when we did the big shed, there was a mistake somewhere in the design stage and most of the lights were installed at the wrong spacing, shed still looked really bright but walking down the passage way with a lux meter showed it dropping off quite a lot when you were mid point between the 2 lights, they altered all the lights to the correct spacing and to the naked eye there seems no difference but walking about with the lux metre shows a far more even reading, you do get ahigh reading directly below them but not the big drop off like before.

i use a lux meter sometimes there only 80 quid for a decent one. i used it a lot when led 1st came out because they were crap still use it now and then but only when a punter says the lighting isnt as good and it shuts them up when you test with it