LED 5050 cool white strips in Flourescent getting hot

Won't work
The whole complete reel is only 12v
The segments are wired parallel in the tape
Each end of each cut Mark is parallel (+ -)
Not saying impossible...But it would be a real messy wiring job trying to do it
And Very Easy too screwup

tenbear wrote:

mrgreetis wrote:
Great job. I don't have any fluorescents in our TT, but in our house the kitchen fluorescents are starting to go. I am planning on converting them to LEDs. The fixture is 2 sets of 2 48 inch tubes so I figure 16 feet would be about right. I may have to double up and replace each tube with a double string of LEDs. Just need to remember to get the 12V power supply.

Have you thought about wiring 10 short strips in series and feeding the 120vac power thru a bridge rectifier to this now 120v string?

I have never tried this but I don't see any reason that it wouldn't work. :h

mrgreetis wrote:
Great job. I don't have any fluorescents in our TT, but in our house the kitchen fluorescents are starting to go. I am planning on converting them to LEDs. The fixture is 2 sets of 2 48 inch tubes so I figure 16 feet would be about right. I may have to double up and replace each tube with a double string of LEDs. Just need to remember to get the 12V power supply.

Have you thought about wiring 10 short strips in series and feeding the 120vac power thru a bridge rectifier to this now 120v string?

I have never tried this but I don't see any reason that it wouldn't work. :h

One 5 meter..16.4 ft string uses 70 watts
And will produce light equivalent to 140 watts or more fluorescent tubes

Should be a perfect replacement
Remember you cut by segments..every THREE LED's is one segment
Your 4 pieces will probably just under 4 ft each in length
Strips are always a multiple number of segments of ( 3 LED's)

Great job. I don't have any fluorescents in our TT, but in our house the kitchen fluorescents are starting to go. I am planning on converting them to LEDs. The fixture is 2 sets of 2 48 inch tubes so I figure 16 feet would be about right. I may have to double up and replace each tube with a double string of LEDs. Just need to remember to get the 12V power supply.

remember, LED's are FAR from 100% efficient. that means heat. Not near as much as an incandescent, but still heat. Depending on construction and what LED's are used, figure 20-30% effficency. the rest is heat. And if they are using a simple dropping resistor to limit current, highly dependent on supply voltage. Good one use a constant current source that is independent of supply voltage over a wide supply voltage range.

I have strips on multiple florescent fixtures. Like any LED they will get warm to the touch. they should NOT get hot enough to burn or be uncomfortable but they will get reasonably warm.

I got started on my Florescent Fixtures a couple years ago by following this thread.
Inexpensive Fluorescent to LED Upgrade
Lots of good info. Could not be happier with my install.

Fred...these are what I used

Strip roll LED's

They are NOT yellow like the one picture

There seems to be a sweet-spot with voltage and an LED. Tweak the voltage upwards starting dim and measure temperature. Soon, bit-by-bit, the lamp will be bright. Then, continuing, it seems brightness does not increase a lot but temperature does. With those el cheapo 5050 smd 36 point glue-on squares, I have measured 126F @ an ambient of 70F and power of 12.03 volts.

My have been in since April 2013, I have 2 strips, 4 strips and 5 strips in bathroom. Never a problem I removed everything from the fixture.

I put Buck DC-DC Adjustable Step Down Power Supplies on each of my LED fixtures. This stopped heat problem. Check voltage going to your fixture. If it is over 12.5 volts. Install one of these. I purchase mine off EBAY for much less than Amazon link above.