These 21W T5 LED retrofit lamps make an excellent replacement for all 24W HO T5 fluorescent lamps.
The AgroLED iSunshine lamps comes in two spectrums:
White: are an excellent choice for the vegetative phase of your plants lifecycle. Ideal for growing seedlings and microgreens.
Bloom: are an excellent choice for the bloom and the complete cycle of your plants life.
Your choice of 4 x 21W AgroLED bulbs:
4 x 5500° K White (for plant growth or seedlings) or
4 x 5500 K VEG + UV (for plant growth or hardening seedlings) or
4 x 5500° K Bloom (for fruiting & flowering) or 2 x White and 2 x Bloom for a Full Spectrum effect