There are 2 drawbacks with the njd - 1) its physically big, has its own case and is not din mounting, 2) its only leading edge dimming, so doesnt play nicely with some dimmable 240v leds More than one dimmer block could be fed from a single consumer unit rcd circuit if required, and there are other wall mount dmx dimmer packs available since the njd is difficult to find now Someone has more than 10 new ones on ebay for £230 each inc postage,Įach njd dimmer is a freestanding box (wall mount) that would have a single 240v feed from a circuit breaker (rcd protected with current uk wiring regs) in the consumer unit - it then has upto 12 outputs, each of which feeds a separate lighting circuit so for example 3 circuits for the lounge, 3 for dining room etc etc They are quite large and suitable for wall mounting, but are not din mounting and are too large for an enclosure, but each one is a compete enclosure in itself with multiple cable in/out points Yes i still have them - there are 4 of the flat rectangular box versions, and 1 of the hex profiled version. Even the most expensive soraa gu10 with a ra of 95 is currently only £25-30 each and is likely to have significant competition in the coming years or so. The currently bulbs around 400-600 lumens have good colour rendering ra>80, reasonable dimming (most of them anyway) for £5-10 per piece. Integrated led fittings are quite expensive and you cant separate the light source from your choice of fittings - you would have to have a stock of spare light fittings because you are unlikely to get an exact replacement in 2/3/5 years when one or more fail.Ģ40v leds are improving so rapidly that it makes sense to dim the 240v via dmx or loxone dimmers centally (or partly distributed at several points), and use standard light fittings with your coice of retrofit dimmable bulbs - as technology develops you can replace the bulbs cheaply and easily whilst keeping your fittings for the life of the property.
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In theory there is value/logic in doing 240v to lv at one place (efficiency for one) but then all your wiring has to carry much higher current, require expensive power supplies and currently there is a severe lack of good low voltage house lighting that is not rgb(w) and very little of it is interchangeable without messing up your ceilings