I have a question on lights-
I am growing these (above picture is the biggest one of the three plants) on natural lights in the UK, which is now receiving 15 hours of day light, but maybe 20 minutes of direct sunlight everyday.
i don't think they have enough light. they are growing tall i feel- 60 cm high with only the 5th set of leaves.

What kind of lights should i supplement the day light with?
not too expensive £60, which is like $100 which is ok for veg and flowering stage? im not concerned about heat from the light as its near a window and ventilated enough with cold british air.