Question 1

Are these dim-able?

Accepted Answer

I bought four of these LED lamps. My application for them is close-up photography.

I do not know if they are dim-able. The boxes they came in had no instructions or specification for this. I wish I could be more helpful in this regard.

The color temperature is stated as 6000K but I found that they were all higher (6300, 6500, 6600, 6900) which makes them more blue.

Also, the front rim is slightly thicker than the incandescent lamps they replaced, enough that I had to eliminate the UV filter that was in place with the original lamps. This may have contributed to the higher color temperature but not the variation between the four LED lamps.

Nevertheless, they are a wonderful improvement over the incandescent lamps they replaced. No more burned fingers when adjusting them; just pleasant warmth to the touch. I also gained two f-stops that were lost in filtering the incandescent lamps to balance the color temperature so the camera sensor has more equal levels of light in all the colors (less digital noise in the blue channel).

Question 2

Can they be used with a dimmer control?

Accepted Answer

I tried using in with dimmer control. It was not so successful. I wish I had recorded it so I could show you.  It will dim but it's unable to shut off completely. It flickers like a strobe light. Plus it's very white light rather than a more natural light.  Not useful in my entertainment room.
I wrote to the manufacturer but there was no response. The three units I purchased reside in a drawer now essentially in new condition.

Brand	Collection LED
Model	CL-MR16-4W-C

Shape	MR16
Directional	Yes
Base	GU5.3
Wattage Equivalent	30 W Equivalent
Power Consumption	4.67 Watts
Light Appearance	Cool White
Dimmable	No
Lumen Range	200 to 399
Lumen Output	255
Color Temperature	6000K
Lifetime Hours	40,000
Voltage	120 Volt

Energy Star	No
Features	Taiwan Diodes - High brightness tier 1 lighting technology, shock resistant, 40,000 hour life span Polycarbonate Lens - Shatter resistant & cool to touch 100% Aluminum Heat Sink - prevents excessive heat buildup in the bulb & its surroundings Constant light stream - no high frequency flickering (Protection for eyes) No Ultra-violet Light - Does not attract insects. Does not damage fabric & materials

Collection LED MR 16 / 4 Watt / 30 watt Halogen replacement / 255 lumen / 6000k / 45 Degree Beam Angle / UL

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Item#: N82E16882374006