Recommendation for LED spots

2015-04-30 07:00:43

The distance depends on the beam angle and the ceiling height.

This can be calculated relatively easily using the tangent
Tangent alpha = opposite side/adjacent side

Opposite side = radius of the illuminated area on the floor
Adjacent side = room height
alpha = half of the beam angle

Rearrange the formula a bit and done:
Radius of the illuminated area = tangent (beam angle/2) * room height

I then sketched the room, "nicely" arranged the ceiling spots, and used a compass and the radius calculated above to draw the illuminated areas. If unlit areas occur, the position of the ceiling spots must be adjusted or additional spots added.
But beware: If the spot is supposed to shine, for example, on the countertop, the distance from the ceiling to the countertop must be used in the formula instead of the room height.

Thank you very much! I now know what I do not miss about my (long past) school days.

2015-04-30 08:05:45

P.S.
This is not my idea, although these were topics I liked in school (unlike differential and integral calculus). I also just read it somewhere once when I was installing the spots at my place. But I found it quite helpful because at first I had no idea how to choose the distances.

2015-04-30 19:14:21

I already knew why I became a business administration student. Simple math suits me, the rest...... better not.

2015-05-02 21:10:06

The price differences are not only in the name but also in the quality. With brand manufacturers, you also get a 3-5 year warranty on the spots, which quickly justifies the higher price. However, Ikea spots, for example, are also quite good. I haven't had any failures so far, regardless of the manufacturer. It is important not to choose the ones with many small "bulbs" inside; that is completely outdated technology, less efficient, and breaks quickly. You should not plan based on wattage for LED lamps but rather on the lumen specifications, because unlike with incandescent bulbs, this is not simply a linear relationship. 15-watt spots usually have 1200-1500 lumens, which corresponds to 90-100 watts as an incandescent bulb.

2015-05-10 10:40:22

We are currently planning our LED spots for the ceiling on the ground floor and the outdoor roof overhang. With the city villa, the lamps would hang quite high. Almost no one in the new development area has something like that, is that too high for a city villa? We want to use them to illuminate the pathway to the front door and the driveway to the carport. The terrace will probably be better illuminated with regular wall lights? But when do you actually need light outside on the terrace? Actually, you could also use lamps in the roof overhang here. But we don’t want it to end up not being enough for whatever reason and not to have had cables laid outside for wall lights...

2015-05-10 18:00:08

We are also building a town villa, but on the outside we have decided on wall lights. Partly with and partly without motion sensors. Without motion sensors, however, there is a switch inside. In the roof overhang it would be much too far from the path and eventually the lights will have to be changed. There are also very beautiful path lights as standing lamps.

Similar topics
02.11.2016	Installing LEDs and energy-saving lamps	17
07.07.2014	LED Recessed Spotlight Positioning Proposal	29
27.04.2016	Hanging ceiling for LED	18
10.07.2017	LED instead of halogen spot	23
20.02.2018	Short lamp recessed housing recommendation in concrete ceiling	12
20.08.2018	Floor plan optimization city villa 180m2 (with visualizations)	24
26.01.2019	Which light bulbs - only LED or others as well?	41
08.04.2020	How many lamps are in the 7-meter long hallway?	13
22.03.2021	Planning of LED spots - Please provide tips	19
26.09.2020	Lamps for the whole apartment - Tips wanted	26
05.12.2020	193 sqm urban villa with north orientation, is it sensible?	38
22.08.2023	Can a covered terrace be counted as living space?	51
27.02.2021	Location of city villa or single-family house on a plot with a wide street frontage	63
01.04.2021	Lighting planning and arrangement of LED spots	13
08.05.2021	Floor plan construction project city villa with hip roof	15
05.07.2021	How many lumens do you have in your living room?	20
18.06.2022	Floor plan single-family house city villa approx. 200m² - Bavaria	14
21.10.2022	Outdoor lighting with motion sensor and continuous operation?	18
18.11.2022	Which smart lamps are suitable for Matter?	40
08.10.2023	Planning outdoor lighting, focus on burglary security	38

Recommendation for LED spots

Voki1

Musketier

EveundGerd

nathi

Payday

EveundGerd