LED

[90cummins]

Led shop lights.
I've been replacing the CFL's in my home with LED's since summer and it's now time to upgrade my shop lights.
My shop is 40x60 with 12x12 doors and is poorly lighted.
The main lighting consists of (6) 8ft (2x60w) T12 fixtures approximately 10 off the floor.
Around my lift I have four 8ft fixtures with three T8 32w 6500k (Daylight) lamps each.
The T8's are new and provide quality light and are not going to be changed out yet.
The main is lighting is not performing and one the reasons is that they are turned on & off frequently and are started cold because the shop is heated only when I use it.
I replaced the T12's with 48w 6500k 6000 lumen LED's.
The LED's are direct wired for 120v so I just disconnected the ballast and rewired them leaving the ballast in place.
The improvement was huge! The new lights are much brighter and allow me see detail much better.
The previously dark corners of the shop are now nicely illuminated.
I have a Killawatt meter so I measured the power consumption of the oil & new lights which I found very interesting.

The old F96T12 60w lamp data; VA 143 W92 A1.16 PF.65 X's 12 lights = 13.92A
Total power consumed = 1.716kw x 8hr = 13.72kw per day.

New LED 48w 6500K 6000Lumen; VA 96 W92 A.79 PF.96 X's 12 lights = 9.48A
Total power consumed = 1.152kw x 8hr = 9.216kw per day.

Yesterday I bought two Phillips 4 direct fit T8 5000k LED's at Home Depot for $10 and installed them for comparison against 2 F32T8 Daylight lamps.
These LEDs are direct fit and use the original ballast for power and are surprisingly less efficient than the T8's.
F32 T8 LAMPS VA 82 W63 A.68 PF.76 x12 LIGHTS = 8.16A
LED VA 96 W93 A.79 PF.95 X12 LIGHTS = 9.48A
Hope you find this as informative as I did.
90cummins

 

[Ford850]

Led shop lights.
I've been replacing the CFL's in my home with LED's since summer and it's now time to upgrade my shop lights.
My shop is 40x60 with 12x12 doors and is poorly lighted.
The main lighting consists of (6) 8ft (2x60w) T12 fixtures approximately 10 off the floor.
Around my lift I have four 8ft fixtures with three T8 32w 6500k (Daylight) lamps each.
The T8's are new and provide quality light and are not going to be changed out yet.
The main is lighting is not performing and one the reasons is that they are turned on & off frequently and are started cold because the shop is heated only when I use it.
I replaced the T12's with 48w 6500k 6000 lumen LED's.
The LED's are direct wired for 120v so I just disconnected the ballast and rewired them leaving the ballast in place.
The improvement was huge! The new lights are much brighter and allow me see detail much better.
The previously dark corners of the shop are now nicely illuminated.
I have a Killawatt meter so I measured the power consumption of the oil & new lights which I found very interesting.

The old F96T12 60w lamp data; VA 143 W92 A1.16 PF.65 X's 12 lights = 13.92A
Total power consumed = 1.716kw x 8hr = 13.72kw per day.

New LED 48w 6500K 6000Lumen; VA 96 W92 A.79 PF.96 X's 12 lights = 9.48A
Total power consumed = 1.152kw x 8hr = 9.216kw per day.

Yesterday I bought two Phillips 4 direct fit T8 5000k LED's at Home Depot for $10 and installed them for comparison against 2 F32T8 Daylight lamps.
These LEDs are direct fit and use the original ballast for power and are surprisingly less efficient than the T8's.
F32 T8 LAMPS VA 82 W63 A.68 PF.76 x12 LIGHTS = 8.16A
LED VA 96 W93 A.79 PF.95 X12 LIGHTS = 9.48A
Hope you find this as informative as I did.
90cummins

Wow! Very good info... Thank you.
Are the new Phillips LEDs any brighter than the old T8's? It seems to prove replacing bulbs only is not the best move.

 

[pmsmechanic]

Good info here. Thanks.

 

[newbury]

Led shop lights.<snip>
The improvement was huge! The new lights are much brighter and allow me see detail much better.
The previously dark corners of the shop are now nicely illuminated.<snip>

Any measurements of light?
There are apps for smartphones that easily measure lumens or lux.
For example:

<snip>
In my shops in Mississippi:
With one of the Feit lights about a foot below my 12' ceiling I measured 450 Lux at waist level.
With one of my old 8 foot tube dual 60 watt bulb fluorescent fixtures about 6 inches below the ceiling I measured 230 Lux at waist level.
With one of the tubes in my "deballasted" fixture about 6 inches below the ceiling I measured 420 Lux at waist level.
With TWO of the tubes in my "deballasted" fixture about 6 inches below the ceiling I measured 700 Lux at waist level.<snip>

 

[k0ua]

Any measurements of light?
There are apps for smartphones that easily measure lumens or lux.
For example:

I started a thread about replacing some 40 watt 4 tubes in my wife's sewing room with Cree BR30 flood lamps. I went from 80 watts of usage to 36 watts of usage, and 461 lux to 1655 lux. measured at same point I think a lot of my gain is the fact the floods point down and put the light exactly where needed instead of squirting a lot out the sides and top of the top and relying on a not very reflective reflector.

http://www.tractorbynet.com/forums/related-topics/350836-led-retrofit-sewing-room.html?highlight=