Philips Master SON-T PIA Plus 600W HPS Bulb – E40 Fitting
Philips Master SON-T PIA Plus 600W HPS Bulb – E40 Fitting
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
- 14-day returns
- Price match promise
- Free Wembley store pickup
- Advice from the team: 020 3488 0419
Description
Deep red output for the flowering stretch
The Philips Master SON-T PIA Plus 600W is a high-pressure sodium lamp built around Philips PIA discharge technology, giving it a red-rich spectrum that suits plants moving into flowering or fruiting. The clear tubular bulb and E40 fitting mean it drops straight into any standard 600W HPS reflector and ballast, making it a straightforward swap for a tired or ageing lamp.
Key Benefits
- Red-heavy spectrum weighted toward the orange-red band that drives flowering and fruiting response.
- High light output from a single 600W lamp, holding its output well through its working life.
- PIA discharge tube keeps the arc stable, so colour and intensity stay consistent lamp to lamp.
- Standard E40 base fits existing 600W HPS reflectors without any adaptor.
- Universal burning position works vertically or horizontally in most reflector styles.
Getting the Spectrum Right for Flowering
A general-purpose or worn-out HPS lamp can leave plants short of the red light that triggers strong flowering and fruit set, showing up as stretchy growth and a slow response after the switch. The PIA Plus is built specifically for that stage, concentrating its output in the wavelengths flowering plants use most.
How to Use
- Fit into a 600W-rated HPS reflector with a matching magnetic or electronic ballast.
- Position the reflector so the canopy sits at the distance recommended for a 600W HPS fixture, adjusting as plants grow.
- Run through the flowering or fruiting stage of the cycle for the strongest benefit from the red-shifted spectrum.
- Replace once a season or after extended use, as HPS output falls off gradually even when the lamp still lights.
- Wattage: 600W
- Luminous flux: approx. 90,000 lumens
- Colour temperature: approx. 2000K (red-shifted)
- Base: E40
- Bulb type: Clear tubular
- Burning position: Universal
- Compatibility: Standard 600W HPS reflectors and ballasts

FREE Express Delivery on orders over £60. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.
