Lighting – What does that mean if the LED light bulb starts blinking when I turned it on

Do you have the space for an adapter like this one?

Lighting EVER Candelabra Screw (E12) to Medium Screw (E26) Enlarger Light Bulb Socket Adapter

Q: I'm going to overload it by using a larger bulb ?

A:

• Electrically you are limited to the maximum amperage that the wiring will support, if it is rated for a 75W 125V then that's 0.6 Amps each (Wattage = Voltage * Amperage). You're not changing the voltage or number of lamp so it doesn't quite matter (doing the numbers that is). You can do up to the same amount of actual Wattage used, which for LEDs would be significantly less.

• Heatwise, the LEDs should produce significantly less heat than incandescent, just make sure you have at least 1/8" between the LED's bulb and the shade/globe/etc and you should be alright; incandescent should be more like >1/2".

• CFL Side Note The same electricity rules apply for CFLs (or anything, note CFLs do have a peak turning on but I doubt you'll find a 75 actual Wattage CFL to fit), but I'd increase the minimum gap for heat to about the same as in incandescent ~1/2". I've had a few cheaper lamps with CFLs burn/melt so I'm a little over cautious with CFL and proximity even though they should produce less heat than their incandescent Lumen- relative counterpart.

Q: The bulbs will be put in sideways; I hear many LED bulbs are unidirectional; what degree/angle should I be looking for?

A: For unidirectional light, you probably need to find one with a diffuser or multiple LEDs pointing in different directions. If you can see the individual LED(s), it will shine light in the opposite direction(s) it/they are mounted only so if they all point in the same direction it's unidirectional. If you can't see the individual LED(s) then it is probably diffused (though it may not be diffused well)

Do you have a picture of the cover? It seems very likely that all your problem simply relate to an overheating. Is there a chance for a better air flow (thermal ventilation)?