There are many places where LED downlights are sold. Examples of places where LED downlights are sold includes Home Depot, Amazon, DH Gate, and 1000 Bulbs.
Which bulb are you trying to change?
how can i change bulb
Why is lightening of bulb not a chemical change
The best place to buy downlights would be in your local lighting fixture store. It is best and easiest to be able to physically see and touch the lights to see if they will work in the space you are looking for.
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How do I change Nissan ALMERA DASHBOARD LIGHT BULB
how do you change a dashboard bulb in a renault clio?
You cant just change the bulb, you have to change the whole headlamp.
Which bulb?