Philips - 315 CMH Grow Bulb

Philips 315W CMH grow bulbs provide a bright, broad-spectrum white light for indoor growing. Choose the spectrum that best matches your stage of growth:

• 4200K – Veg: cooler spectrum for seedlings, propagation and vegetative growth.
• 3100K – Bloom / Full Cycle: warmer horticultural spectrum for flowering and fruiting, and suitable for full-cycle growing.

4200K – Veg

Choose the 4200K Philips MASTERColor for vegetative growth. Its cooler, whiter spectrum has greater emphasis on blue light, making it a good choice for seedlings, cuttings, propagation and leafy growth.

• 315W ceramic metal halide lamp
• 4200K cool-white spectrum
• Ideal for vegetative growth and propagation
• 34,300 initial lumens
• CRI: 90
• PGZX18 base
• Rated average life: 25,000 hours
• Philips colour code: 942

3100K – Bloom / Full Cycle

Choose the Philips MASTER GreenPower Elite Agro 3100K for flowering and fruiting. Its warmer horticultural spectrum has greater emphasis on the red portion of the spectrum and is especially well suited to bloom.

The 3100K GreenPower lamp can also be used from start to finish if you want one bulb for the entire growing cycle.

• 315W ceramic metal halide lamp
• 3100K warm horticultural spectrum
• Ideal for flowering and fruiting
• Suitable for full-cycle growing
• PGZX18 base
• Rated average life: 30,000 hours
• Philips colour code: 930
• UPC: 046677415211
• Model: GreenPower CDM-TP 315W/T12/U/O

Which One Should I Buy?

Growing seedlings or plants in veg?
Choose 4200K.

Flowering or fruiting?
Choose 3100K.

Want to use one bulb from start to finish?
Choose 3100K GreenPower Elite Agro.

Compatibility

These are replacement lamps only and require a compatible 315W CMH/CDM fixture with a PGZX18 lamp holder and suitable control gear.

They are not designed for standard household light sockets.

Why Use CMH?

Ceramic metal halide lighting produces a broad white spectrum with much better colour rendering than traditional HPS lighting. This makes it easier to see the natural colour of your plants while still providing strong light for indoor growing.

CMH fixtures also produce radiant heat, which can be useful in cooler grow rooms, basements and winter growing environments.