Yes, your seeds start indoors without sunlight just fine when you use artificial lights. Grow bulbs give young plants everything they need to grow strong and healthy. Thousands of gardeners run seed setups in basements, closets, and spare rooms with no windows at all and get great results.
I've grown all my seedlings in a windowless basement for the past six years now. My setup uses cheap shop lights from the hardware store hung on chains above wire shelving. Not a single ray of sunlight reaches those plants, yet they grow into sturdy transplants that thrive in my garden every summer.
Your seedlings care about light strength and hours of exposure, not where the light comes from. The chlorophyll in their leaves absorbs certain wavelengths to power growth. Both sunlight and artificial light seed starting methods deliver those wavelengths just fine. Your plants can't tell the difference at all.
Grow lights for seeds come in many styles and price points for you to choose from. LED panels run cool and use little power but cost more upfront. Fluorescent tubes are cheap and work great for most veggies. Even basic $15 shop lights with T8 bulbs will grow beautiful seedlings if you hang them close enough to your trays.
Extension programs say to run your lights for 14-18 hours per day during seed starting. Put the bulbs just 4-6 inches above your seedling tops for best results. Raise the lights as your plants grow taller to keep that close gap. A simple plug-in timer takes the guesswork out of keeping a steady schedule for you.
Distance matters more than most new growers think at first. Lights lose strength fast as you move away from the bulb. A seedling sitting 12 inches below a shop light gets only a small part of the brightness. Keep your lights low and your seedlings will grow short and strong instead of tall and weak.
I run my lights from 6 AM to 10 PM every day, which gives my plants 16 hours of light. The dark hours at night matter too for your plants. They use that rest time to process what they built during the day. Don't run lights around the clock or you'll stress your seedlings out.
The bottom line is that sunlight is nice but not needed for starting seeds inside. A basic artificial light setup costs you less than fifty dollars and fits almost anywhere in your home. You can grow hundreds of healthy transplants each spring without ever putting a single tray near a window.
Read the full article: Starting Seeds Indoors: A Complete Guide
