Lighting and home electrics, written down
Zero Ohm publishes measured notes on domestic lighting and electrics in the Emirates, covering layered schemes, colour rendering, LED dimming, first fix cable planning and kitchen task light. Every note carries the working figures: lumens, lux, Kelvin, CRI and R9, watts, millimetre dimensions and dirham prices at 2026 trade counters.
Latest notes
4 August 2026
A three layer scheme splits a 20 square metre living room into ambient light at 1500 to 2000 lumens, task light at 300 to 500 lux on the page, and accent light at two to three times the surrounding luminance. The three layers draw 56 W and cost about 1.80 AED a month.
28 July 2026
A CRI 80 lamp desaturates walnut, terracotta and rust linen because the R9 value sits near zero. A specification GU10 at CRI 97 with R9 above 90 costs 90 to 140 AED against 12 to 18 AED, and gives up 30 lumens per watt of efficacy for the accuracy.
19 July 2026
LED flicker below 30 per cent comes from the driver, the dimmer and the connected load together. Four 4 W downlights present 16 W against the 20 W minimum load printed on most retail dimmers, which is the single most common cause of flicker in a finished apartment.
7 July 2026
A conduit drop added before plaster costs about 40 AED in materials, while the same drop added after plaster costs 400 to 700 AED per wall in labour, filler and paint. Six client questions, six mounting heights and four spare cable runs decide most of that difference.
25 June 2026
An under cabinet strip mounted at the back of a 320 mm cabinet lights the splashback and leaves the front 300 mm of the worktop dark. Moving the strip to within 40 mm of the front edge fixes the shadow and hides the diodes from a person standing at the counter.