✍️ Sonia Pardasani, Co-founder BageechaBox | 🕐 5 min read | Equipment Guide
Quick answer: Most home growers don't need expensive LED grow lights to start — 3–4 hours of indirect sunlight from a south or east-facing window is enough for most microgreen varieties. Grow lights are worth it only if your space gets fewer than 2–3 hours of natural light, your greens keep going leggy despite good light, or you're growing year-round or at commercial scale.
The most common question new growers ask: do I need to spend ₹3,000–5,000 on LED grow lights to grow microgreens at home? The honest answer: probably not to start. Here's what light actually does — and when you genuinely need artificial lighting.
What Light Does for Microgreens
Microgreens don't need light for germination — they need darkness (the blackout stage). Light is only needed after germination, to trigger chlorophyll production and prevent the seedlings from stretching (going leggy). The good news: microgreens need much less light than fruiting plants like tomatoes or chillies.
Can I Use Natural Light?
Yes — if you have a south or east-facing window with 3–4 hours of indirect sunlight daily. That's enough for most varieties. Rotate the tray 180° every day for even growth.
What doesn't work: north-facing windows, deep interior spots with no direct sky view, or rooms where the only light comes from a bulb.
When You Actually Need Grow Lights
- Your home gets fewer than 2–3 hours of natural light daily
- Your microgreens keep growing leggy despite the right window
- You want to grow year-round in a windowless grow space
- You're scaling to commercial volumes where consistency matters
What to Buy If You Need One
A simple full-spectrum LED grow bar or panel in the 20–45W range is more than sufficient for home growing. Avoid expensive reef tank lights or specialist horticultural lights — they're overkill. Keep the light 6–10 inches above the canopy and run for 12–14 hours daily.
Frequently Asked Questions
Do microgreens need light to germinate?
No — they need darkness during the blackout stage. Light only becomes necessary after germination, to trigger chlorophyll production and prevent the seedlings from stretching thin (going leggy).
Can I grow microgreens with just natural window light?
Yes, if you have a south or east-facing window with 3–4 hours of indirect sunlight daily — that's enough for most varieties. Rotate the tray 180° daily for even growth. North-facing windows or deep interior spots with no direct sky view generally aren't sufficient.
When do I actually need a grow light?
When your space gets fewer than 2–3 hours of natural light daily, your microgreens keep going leggy despite a good window, you want to grow year-round in a windowless space, or you're scaling to commercial volumes.
What kind of grow light should I buy?
A simple full-spectrum LED grow bar or panel in the 20–45W range is more than sufficient for home growing — avoid expensive reef tank or specialist horticultural lights, they're overkill. Keep it 6–10 inches above the canopy and run it for 12–14 hours daily.