Greenhouses and agriculture

What the facility needs

In a greenhouse the lighting splits into two unrelated tasks. The first is light for people in the walkways and at sorting and packing. ShNK 2.01.05-24 does not apply to rooms for plants (introductory part: they are excluded from its scope), so the target is set by the specification; guide values from similar rooms in app. 9 are 50-100 lx for passages and 300 lx at 0.8 m for goods sorting. The second is supplementary lighting for the plants: it is calculated in PAR rather than in lux, as PPFD in µmol/m²·s and a daily light integral by crop and stage. We solve the first and say so before the contract.

The environment is harder than a shop floor: humidity, condensation, treatment with solutions, a day-to-night temperature swing. All of it works against seals and terminal connections.

Why these series

Prom hangs on a cable between the structures and gives general light to the walkways from 4 m upwards. IP54 covers dust and splashes; for directly watered zones the ingress protection is selected separately.

Line serves the sorting and packing station: 300 lx on the work surface without dips between the suspension points.

Classic covers the access road and the receiving area: an outdoor IP65 housing under open sky.

Typical layout

A greenhouse of ≈ 5,000 m², mounting height 5 m, eight process walkways:

• walkways: SVO 01 Prom 50W along the walkway, spacing ≈ 6 m, ≈ 110 pcs
• sorting and packing, ≈ 200 m²: SVO 01 Line 50W, ≈ 25 pcs
• receiving area: SKU 01 Classic 50W, ≈ 6 pcs
• ≈ 141 luminaires in total, installed load ≈ 7.1 kW

Prom 50W, Line 50W and Classic 50W have no consistent IES file of their own: the flux is calculated from the module in the 2018 series files, Prom 50W 6,500 lm, Line 50W 7,000 lm, Classic 50W 6,500 lm per the file header. Utilisation factor method with MF 0.63 (humidity, condensation; safety factor 1.6, MF = 1/1.6): the average over the area is 110 × 6,500 × 0.5 × 0.63 / 5,000 ≈ 45 lx, with noticeably more under the run in the walkway; sorting with UF 0.5 and MF 0.71 gives 25 × 7,000 × 0.5 × 0.71 / 200 ≈ 300 lx.

What the replacement gives

Before: the previous lighting is usually assembled from floodlights and incandescent lamps, and only a site survey gives an exact basis. As a reference point, the same volume of light on 130 mercury-vapour 250 W lamps at 280 W with ballast is ≈ 36 kW.

After: ≈ 7.1 kW. At 10 hours a day and 300 days a year the difference is ≈ 88,000 kWh a year; in UZS, by the tariff on the date of the calculation (see the savings calculator). Supplementary lighting for the plants is not in this calculation: it is a separate system and a separate load.

A calculated estimate under the stated assumptions; it needs measurements on site. Figures marked ≈ are estimates.

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