full spectrum light or white light for seedlings

prop · May 3, 2026

what's better for seedlings? how much water do they need? i have them on a heating mat and in carboard cups

carlosescobar · May 3, 2026

thats how i do it , i lost so many seeds at one point, as soon as i got a reptile heat mat i had 100% germination , still didnt stop me overwatering though, they need less than you think . ive got mine under a humidity dome and when they dry out a bit i will only water from the bottom, to force those roots down...what you dont want to do is dribble a small amount every few hours and keeping it wet
seedlings seem to like it if the soil temp is around 22 oC

Ninjadogma · May 3, 2026

I'm gonna say it's not necessarily a full spectrum vs white for seedlings... Plants are going to benefit the most from full spectrum and when it comes to seedlings, they prefer diffused light. Something that mimicks an overcast day. Thats why people swear by T5 tubes. LED isn't diffused, it's a direct beam hitting the plant. To break it up and diffuse it, you can throw a sheet of white poly between the LED light and your seedlings. Think white poly plastic greenhouses. It's the diffused light that makes them so killer.

Coconutz · May 3, 2026

White light is made up of rgb idk if there's a actual difference between full spectrum and white?

Every white light I've looked at without exception is made up from blue, green and red afaik aka full spectrum?

Hossgrows · May 3, 2026

I use T12 65K. 2400lu fluorescent bulbs.

They work great, and no worries of burning them. These are 7 &5 weeks old, and will go outside in the next week or so.

Bogota.Mark · May 18, 2026

carlosescobar said:
thats how i do it , i lost so many seeds at one point, as soon as i got a reptile heat mat i had 100% germination , still didnt stop me overwatering though, they need less than you think . ive got mine under a humidity dome and when they dry out a bit i will only water from the bottom, to force those roots down...what you dont want to do is dribble a small amount every few hours and keeping it wet
seedlings seem to like it if the soil temp is around 22 oC

Carlos, if I may ask. I have a 100w (full spectrum) set up from Amazon. My seedlings seemed stretched. How far above my plants should my lights be ? Its a 2 prong bendable set up. TY they are in 5" peat pots........

full spectrum light or white light for seedlings

full spectrum light or white light for seedlings

prop

carlosescobar

Ninjadogma

Coconutz

Hossgrows

Bogota.Mark

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