Really hot cfl why???

One of my larger cfl 125 watt 6500k get very hot after just being on for 5 minutes why is this my others can run for hours and do not burn if u touch them

125w is 540% of the energy of a 23w bulb. If the bulbs surface area was the same as a 23w bulb it would be around 6 times hotter than a 23w bulb. As the surface area is a bit bigger it should be around twice as hot as a smaller bulb.

Additionally any bulb larger than 40w and the lumen to watt ratio drops which means you are producing more heat per watt.

The size of the bulb isnt proportionate to how many watts it is. It is producing more light but has less area to dissipate the heat from, therefore it is hotter than say a 42w cfl.

its a 125 watt cfl and is 5 times as hot as my other 125watt cfl

i think i would take that one out

i have just wondering weather it could be wireing issue or bulb fault etc

i bet its the bulb

I have a similar problem with my two 40w 2700ks. I've got them in a 23cf area with 4 other 23w 2700ks. They heat it up like crazy! I have a 6" fan on high for exhaust and a proportionate passive intake and my temps are still hanging at 86-88 degrees.

Hmm? Now I think I'm going to test it after replacing my 40 watters with 23's.

i bet it goes down to 82

Brand can make a difference. My dollar store bulbs (evergreen?) get a bit hotter than my home depot bulbs (TCP).

I did some repositioning first. My lights were about 1.5 inches from my thermo. I'll see if that works and if not then I'll see what happens with 23watters.