LED bulbs in enclosed fixtures?

[RobA]

Picked up some 100 watt equivalent Feit LED bulbs at Costco yesterday. Turns out they were too big to fit in the jelly jar fixture. I have some 60 watt equivalent bulbs that would fit but I'm looking for a brighter light.

 

[Diggin It]

Again, you may be better off going to a different style fixture altogether, or no fixture at all.

 

[bg71361]

Additional info, hope it’s not already posted.

Why You Can't Use Certain LED Bulbs in Enclosed Fixtures — 1Bulbs.com Blog

 

[Professor Marvel]

What heat? .....or technically: Watt heat?
Watts is watts! What? :confused3:

Between 85% and 98% of all the wattage of ANY light is turned into heat. A 10 watt LED can only make around 10% of the heat that a 100 watt incandescent can.

If I could somehow use 80%-90% less energy with LED's yet get the same heat off them as their 100Watt incandescent equivalent, I'd heat my house with them! And the neighbors! And the world! I'd be the next Elon Musk, Bill Gates, etc... because I'd just invented a perpetual motion machine!

Low heat output can be a problem with LED traffic lights when they don't melt the snow off themselves.

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i find the heat is typically coming from the transformer and not the light side and not directly proportional to the watt rating. eg a 40 watt led light i use is supposdly comprable to a 300 watt incandesent. It has far less heat output than a 300 watt light but certainly more than a 40 watt incandesent.

 

[CobyRupert]

When manufacturers say 40 watt LED is comparable to 300 watt incandescent, they’re really saying the Lumen output is comparable. 40 watt LED will output same light (Lumens) as the 300 watt incandescent. Then it becomes a matter of how that light is distributed, but that’s a different conversation.
A 40 watt LED or incandescent can’t generate more than 40 watts of heat.
Seeing how 98% of an incandescent’s energy goes into heat, and 85%-90% of an LEDs goes into heat, if they really are both drawing 40 watts, the heat generated is within a 8%-13% of each other.
Again, distribution. It may be the heat of the LED is generated, and concentrated at, the transformer; whereas an incandescent is more distributed around the bulb, but...
Watts is watts.

 

[ray66v]

As stated, there is a power supply in the base of an LED bulb. And, that's where the heat is created.

They do not run on 120 volts, so a power supply is necessary.

The same is true with a CFL bulb.

If you mount them base up, especially inside an enclosed fixture, the heat from the power supply does dissipate as well, and that can shorten the life of the bulb.

The quality of the electronics used in that power supply are a big factor in how well they handle it.

You can't know for sure without experimenting.

 

[Industrial Toys]

I am not so sure about the heat generated by an LED. You start to pursuade that LED to make lots of light and they start to make heat. Any larger LED light has heat sinks on the LED. I don't think with switching supplies, they would use such an inefficient psu. I could be very wrong.