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Posted on January 26, 2020 by Phil Jones

LG HU70LA CineBeam ThinQ 4K Projector Review – Performance: Brightness, Audible Noise


The LG HU70LA has a rated brightness of 1.500 ANSI lumens. Just how close did the HU70LA come to hitting its target of 1,500 ANSI lumens? I set the projector to VIVID Mode which is its brightness picture mode and its lamp power mode to Minimum energy saving (full power). I then took 3-4 readings about 15-20% out from the center of the lens.

LG HU70LA Brightness (Vivid Mode, Minimum Energy Saving Lamp Power): 1,291 lumens

At wide zoom, VIVID Mode

Brightness at mid-zoom

Color ModeLumens
HDR Effect1291
Expert Bright Room1081
Expert Dark Room1079

The HU70LA measured 1,291 lumens which is a couple hundred lumens less than LG’s brightness claim. This is still more than enough brightness for viewing HDR and SDR content on a 100” screen in a dark room.

For the rest of the modes, I measured them at mid-zoom, so the iris is closed halfway. This is because it is more common for a projector to be zoomed in a bit rather than installed at full wide angle. Since the HU70LA zoom range was so small (1.25:1) the difference in brightness was minimal.

In Minimum energy saving (full power) lamp mode, most of the LG HU70LA picture modes measured within a couple hundred lumens of each other. The Cinema and Expert modes both measured just over 1,000 lumens at mid-zoom while still delivering a fairly accurate picture quality.

Audible Noise

We do not measure audible noise. LG lists the noise level at 24dB in Maximum Energy Saving (Eco mode) and 30dB in Minimum Energy Saving (full power). The HU70LA noise level was in line with other 4K DLP home theater projectors in its price point. While there are quieter home projectors, when the Energy Saving (Lamp Power) is set to its lowest setting, the noise level of the HU70LA was not distracting. There is a noticeable increase in fan noise when switching from low to high lamp power. In high lamp the fan could be heard from my sitting position during quiet scenes, but I didn’t find the noise distracting.

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