Lighting — FAQ
What makes a grow light full spectrum?
Full spectrum lights emit wavelengths from 380-780nm, mimicking natural sunlight. They include crucial blue light for vegetative growth, red light for flowering, and green light for deep canopy penetration—unlike outdated blurple LEDs that only use red and blue diodes.
How far should grow lights be from plants?
Distance varies by wattage: 200W lights sit 12-18 inches from flowering canopies, 100W units need 18-24 inches, and 25-50W lights work best at 24+ inches for seedlings. Always start higher and lower gradually while monitoring for leaf bleaching.
Most new FECiDA and GroCruiser models feature integrated drivers that plug directly into 110V outlets, eliminating bulky adapters. The LBW and SAYHON units still use external drivers for heat isolation—check each product's specs before buying.
Can I use these lights for all growth stages?
Yes, all seven lights provide true full spectrum suitable for seedling through flowering. Higher wattage units (100W+) offer better flowering performance due to higher PPFD, while lower wattage lights excel for clones and vegetative growth where intense light can cause stress.
How much will these add to my electric bill?
A 200W light running 18 hours daily costs about $10-12 per month at average US electricity rates. The 25W desk model runs under $2 monthly. All tested units use efficient LED technology that costs 60% less than old HPS systems while producing less heat.
Why do these 2026 models have zero reviews?
These are newly released 2026 products we tested pre-launch. Our rankings rely on lab measurements and controlled plant trials, not user feedback. Zero reviews mean you're getting cutting-edge technology before market saturation—though you should verify warranty terms with new product lines.
