This Philips lamp is a PLUS - the AGRO bulbs have extra blue and the PLUS lamps do not. This lamp is popular with some growers as the lamp output is very high and this can give a high flowering yield.
Because of the lack of added blues that most HPS agricultural spectrums have, this lamp would usually be used during flowering only. However, it can be used with vegetative growth if desired but note that in some cases stretching can occur with this lamp.
SON T PLUS 600W HPS LAMP This high pressure sodium lamp from Philips is particularly suitable for the flowering stage of plants. The lamp is made of tempered glass containing a discharge tube and a measured amount of sodium. Characteristics of the lamp: Suitable for the flowering stage 89,000 lumens brightness E40 socket
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