We deliberately chose the 13W lamps because we have a very dark countertop. For a bright countertop light could be a glaring and dazzling. Possibly the 8W lamps are more suitable.
The cables are long enough to lead them right behind the wall cabinet (90cm) to the top. The switching power supplies are very flat and have a maximum output power of 20W. Better would be a PSU with 30W, so 2 lamps can be operated with one power pack. We have solved the problem in order to install another kitchen undercounter age and to connect it to a junction box. Here both switching power supplies are connected and are switched together.
Why this option was chosen? The switching power supplies always consume standby power, because the switches are mounted for lamps directly to this. In addition, the switches on the lights is relatively small and difficult to clean (mounted laterally). If you now switch the lights while the kitchen, there is a danger the wall units and switch to pollute.
Since the lights are relatively flat, the heat generated by the lamps interested me on the back. In order to obtain realistic values following measurements were carried out (troom = 21 ° C, operating time = 1h, meter = testo 830-T4):
1. lamp mounted on a frame without covering the back - back temperature about 56 ° C
2. lamp mounted on a frame and back covered with cabinet part - temperature 70 ° C (mounting as under a cabinet)
Temperatures appeared to me quite high and I contacted Osram. Osram confirmed to me these temperatures and identified a limit temperature of 90 ° C for installation on furniture. The same values for the furniture gave me also our kitchen manufacturer. The furniture so it does no harm.
Now I have the temperature measured on top of the cabinet part, to determine which temperatures are transmitted to the food in the pantry. The temperature was 40 ° C there.
Since we have a well-known chocolate spread in this cabinet, for example, I wanted to avoid these high temperatures. In addition I have my 8x4x10mm (outer diameter, inner diameter, length) spacers ordered aluminum and thus the lights 10mm mounted under the cabinet. Thus formed by the normal convection, an air flow around the lamp and the temperature in the cabinet is a maximum of 25 ° C.
The mounting hardware includes 2 metal clips for mounting on the wall cupboards including screws. For the switching power supplies and 2 screws are present.
If other than the supplied screws are used, eg with spacer sleeves, screws with a very flat head or countersunk screws are used (in our 2.5x20), otherwise the metal clip the lamp can no longer absorb.
Overall, we are very pleased with the lamps and we would recommend them to the restrictions each.
