GU10 ceiling lights dim

shinjukumaster

I have recessed downlighters in a bedroom ceiling, arranged in 2 banks of 4, with both banks switched. The lamps are 48 LED (240V). All lights appear dim compared to the output I expected. I tried one of the lamps in another bedroom that has a 3 x GU10 pendant fitting, and found the light output to be fine (much brighter, and adequate). These are spot type lamps, and I know they are slightly recessed, but they are far too dim. Any ideas? On a similar note, our kitchen has 6 x GU10 recessed downlighters with tube type lamps, and these appear slightly dimmer than a neighbouring (other end of the kitchen) 3 x GU10 in a pendant fitting. Could it be something related to having 4, 6, or 8 in series? Previously we had halogen lamps, but did not notice any dimming.

davidkj_2

You can get diffrent ratings of these lamps 20 Watt to 75 Watt 230 Volt ( 75 watt 63 mm diameter) the GU10 only stands for the electrical cap. So for the different light levels could be down to diffrent sizes of lamp or a diffrent manufacture. 48 LED lamps use 3 watts of power and give out between 15-30 watts of light (changes depending on who you ask). What do you mean by "Tube Type Lamps"??:j

shinjukumaster

davidkj wrote: »

You can get diffrent ratings of these lamps 20 Watt to 75 Watt 230 Volt ( 75 watt 63 mm diameter) the GU10 only stands for the electrical cap. So for the different light levels could be down to diffrent sizes of lamp or a diffrent manufacture. 48 LED lamps use 3 watts of power and give out between 15-30 watts of light (changes depending on who you ask). What do you mean by "Tube Type Lamps"??:j

Tube type lamps are the compact neon type (aka energy saver). I take your point about the output of LED lamps, but these are brighter in one fitting that the other... so I don't see how that can be related to output rating.

davidkj_2

If your energy saving light fittings (48 LED Lamps) are diffrent brightnesses i think this is more to with the manufature of the lamps, not to your wiring in your home. I would not expect volt drop on a standard home installation (even though volt drop only effects incandecent lamps).

shinjukumaster

davidkj wrote: »

If your energy saving light fittings (48 LED Lamps) are diffrent brightnesses i think this is more to with the manufature of the lamps, not to your wiring in your home. I would not expect volt drop on a standard home installation (even though volt drop only effects incandecent lamps).

Thanks. If it is voltage drop, I guess I could prove that by removing 3 of the 4 lamps from one array, and note if the brightness changes...?