MiniSpotlightsfor displays

Hello! I am currently using an ETC 436 Source Four Ellipsoidal Fixture in my art installations for smallish objects. I usually mount these from the ceiling and they're never really more than 8 feet away from the object. This one gets really hot and I was wondering if anyone had an LED counterpart that would do the job and maintain an okay range of focus and adjustability.

Brightfield microscopy is the simplest of all the optical microscopy illumination techniques. The sample is illuminated by white light transmitted through the sample. Contrast is generated by changes in light absorption, refractive index or colour as light passes through the stained  specimen.