Suggest an LED bulb for me?

I'm in the process of testing different LED bulbs for a art gallery. What kind of fixture are we talking about? Warm white is like the late day sun, cool is more like noon. Do you need it to dim?

They do put out heat. Read the instructions and they will say not to put them in a enclosed fixture. Doing so will reduce their life span. You will also see that many of the newer, less expensive types are not rated for the extreme life you would associate with LEDs.

Naio wrote:
. . . I like a yellowish light, . . .

For that, you want soft white. Warm white or natural/daylight will be whiter or bluer.

Wayne

Local Home Depot, Lowes, WalMart is fine. Get warm white with 75 or 100w equivalent rating.
Bulb gets fairly warm but not burning hot like incandescent.

Also compare the color rendering index ("CRI") which a good bulb should specify. 100 is "perfect" (or at least equivalent to a black box radiator such as the sun or an incandescent bulb). A CRI over 90 is pretty good; a CRI less than 80 is not so good, and in between is more or less typical mediocrity.

An LED lamp will produce less heat in total than an incandescent bulb, by a ratio pretty close to the actual power consumption ratios. Only about 10% or so of the actual power consumed by a LED light is converted into light; most of the rest becomes heat. (This is still much better than an incandescent bulb.) Where the heat is emited and how it is dissipated may vary greatly from an incandescent bulb, of course.

The actual LED bulb doesn't get very hot, but the heatsink will get really hot. We use several and they get pretty darned warm.

Sounds like you want a warm white, and about 12-1500 lumens. You can't go by wattage, you need to compare actual light output. A 60 watt incandescent light puts out about 850 lumens.

12 vdc or 120 vac? Home Depot has many household 120 vac medium base LED modules.

I have used this bulb for a couple years in our home and have been pleased with it.
A19 LED house bulb
This bulb is white, not warm white, but I have been comfortable with it for reading. It runs quite cool....barely warm to the touch.
The company is excellent to deal with. I would suggest you contact them to ask if they have a warm white version of the A19 bulb.

Look for an 18-watt ACTUAL CONSUMPTION LED bulb. The problem is the heat sinking of high wattage LEDs. A light bulb globe has little if any heat dispersion radiating area or ability. LEDs hate heat. I've been looking at flat panel replacements. Good headroom, and illumination dispersion to minimize shadows. Slap one over top a bulb base hole.

LED's stay cool...at least much cooler than incandescent bulbs.
I like soft white LED's. Available at Home Depot, Lowe's, etc.