Friends have asked me to advise and install replacements for elderly fluorescent fittings. These are 2 no. 58W switch start plain battens (switched separately, no diffusers etc) mounted on exposed shallow timber beams albeit in a '70s house, in a kitchen/living area. The old tubes are 4000K.
The problem is that the lady of the house has SAD and sleep issues while her husband has a preference for relatively subdued lighting. Her recent research has produced recommendations of high levels of high CT light earlier in the day, changing to lower levels of both illumination and CT going into the evening.
What products and controls would anyone here care to suggest that could satisfy most of these requirements? There is little scope for hiding control gear or additional cables, so perhaps radio options? Failing anything suitable, the default is likely to be a pair of LED battens, going up a size to 1800mm.
I'm a several years retired spark and, never having done much with domestic, have a strong preference for avoiding the lifting of boards in the room above.
Thanks in advance for your input.
 
Her recent research has produced recommendations of high levels of high CT light earlier in the day, changing to lower levels of both illumination and CT going into the evening.
Would a dimmer not satisfy the requirement of lower illumination levels?
 
Well, of course. However, we need to consider how both those parameters can be user adjustable in real time.
If you want user linear adjustability of colour temperature, or indeed full colour, or to fully automate that programmed by time, colour temp and intensity, then I believe Philips Hue 'white ambience' or alternative 'colour ambience' ceiling panels can provide that (at a price). Eg a ceiling panel 30cm x 120cm is about £200 for 'white ambience' (eg variable/ programmed colour temp), or other panels (or spotlights) can provide for full colour range. You would need internet access/wifi and a Philips hub and wall switch (or phone app) for control, but otherwise just a maintained supply for the light(s), and then remote/wifi does switching and adjustment.

Worth talking to Philips, or at least researching their products. I think they do a "SAD" bedside lamp for example.
 
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